Oh no! I'm sorry, I thought that I had hit reply, but I must have forgotten and lost my message. I'll just kind of quickly go point by point here. 

I love that the game gave you 90's vibes. One game that gave me some inspiration was Silpheed for the SegaCD. I didn't really think about laser tag or backlight bowling alley, but now that you mention it, I totally see it and think that's great haha.

Yeah, I'll look into ways to let the player know as they're going in. Maybe an introductory stage or just a prompt when they start to get low.

I agree that jumping back in would help keep the pace of things for sure. The way I was looking at it initially, was that you are breaking through an enemy's defensive line, the mines and then the turrets, before enemy fighters came to attack you. Then when you retreat, they are able to re-set up their defences before you get back. But for this, I definitely agree that it would have been better to keep it faster paced. Also, for this I didn't end up putting in an end, so it's just a basic survival mode of sorts.

Bug time! Okay, first off, ughhh lol. It took me a little while to figure out why the enemy explosion was triggering at the centre of the map. It was because of how I set up the weapon hit and the enemy death explosion, they were conflicting on which would spawn. But I've got that sorted out now. As for the enemy spawning, this one was kind of annoying too. So, it's not technically a bug, they do spawn as far as I know. The problem comes it that they are hard to see and find plus with how big the map is. I've had to sweep the map, back and forth, scanning for where they are. It's definitely easier to retreat and then come back so they are in a new location. A few solutions that I am going to consider are: first, make a model for the mines that light up or flash to catch the player's eye. Second, maybe make them spawn closer to where the player spawns (at least for the first wave) so you don't have to look everywhere for it. Lastly, I'm going to see about adding a radar or mini map.

Ooo yeah, a barrel roll could be a really cool addition. I am going to look into making the enemies have an effect when they spawn as though they just came out of light speed or something, or have some of them kind of warp in. That way there is at least a bit of a warning that they are coming and where they will be. But I'm really glad you had fun. I am working on a full release of the game, and this is great feedback, thank you!

Thanks for the feedback! I will be working on patching bugs and putting together a full release of the game, complete with survival (similar to what's submitted to the jam), a story-mode, and maybe even a local multiplayer versus/co-op mode. If you're interested, consider following for updates.

Thanks for checking it out, I'm glad you liked it. Launching out of the bay was one of the biggest things that I wanted to include in the game. I spent way more time on it than I wanted to, but I like how it turned out. It didn't have all of the features that I wanted, like some camera-shake and sound effects, but I'll see about patching that in the full release later down the line. Thanks again!

Thanks, that's part of what I was going for, using some old school games as part of my inspiration. The full game will be a bit different and have some variety with the mechanics. I agree having the player be able to aim with the mouse would have given more control and made for a better experience, I think. 
Restricting the player from being able to just shoot wildly is something that I really like. --lost my train of thought here Haha-- But anyway. In the full release, I am going to see about including a multiplayer feature that will have friendly fire, so more incentive to be careful with your shots.
Thanks again for the feedback!

Thanks for checking it out. I agree, after you get a feel for the pattern and game loop, it gets pretty easy. after the jam I will be working on patching bugs and putting together a full release of the game, complete with survival (similar to what's submitted to the jam), a story-mode, and maybe even a local multiplayer versus/co-op mode. Of course, most of that is subject to change, I don't want to over scope and go crazy with feature creep, like how the jam started.
Thanks again for the feedback.

Thanks for checking it out! Yeah, I think you're right in that implementing mouse aiming would have made it easier and probably a bit more fun for players for sure. I did have a bit of inspiration from Tron with the ship model and level design actually! If I decide to update the game and flesh it out more, I am going to see about adding some Tron-like glow to some parts of the ship and including some glowing engine trail.
As for healing, you'll need to pause ('P') and then select, 'retreat.' And when you are back at base, selecting the 'Merchant' option will spend your funds/score to replenish your health. I'll look into making that clearer too.
Thank you so much for the feedback!

Thanks. Yeah, I guess that is a bit big for a game jam game. I think it's a bit of excess files that I didn't use in the project, (ie: Unreal Engine's Starter Content, and some files that I planned on implementing). I should have found the time to remove those or told the engine to only package what was used. I'm glad you liked the cinematic and the controls. The friendly fire mechanic is something that I enjoy too. Thanks for the feedback.

Haha yeah, sorry. I'm sure I could have removed a bunch of the unused assets and things before packaging. Or just made it package what was used. Thank you so much for the feedback, I really appreciate it. I'm pretty sure that most of the issues are pretty simple fixes. I'm debating going back into it and fixing it up, and maybe even building it into the full game along the lines of what I was originally scoping for. Or just putting it on the shelf as and calling it a success as a game jam game. Thanks again for checking it out. I'm glad you enjoyed it. 

Thanks for checking it out! I'm glad you had fun playing and I'm glad that you liked that enemy shots could hit each other and that the enemies could destroy one another. I did do that intentionally; I really like playing the idea of using friendly fire. Thank you, I have started to take a lot of interest in game UI and menu systems. I think they are super important to a game's immersion.

Thanks for the feedback! Yeah, I wanted to set it up in a way that the player wouldn't really want to just fire freely, but I'd have to agree with you that having it set up with a mouse instead (or as an option even) would have made that both easier and probably more fun. I was kind of going for a classic 8-direction style with it, but the mouse would have fit the game better.
For replenishing your energy (health and ammo), you will regain a portion of it back after each wave of enemies.
As for the funds/score, the purpose of that is to replenish your energy at the space station. To get there, you have to pause ('P' key) and then select the option to retreat (but you need to have at least 25% of your energy (explained in game to be the amount of fuel it costs to make the trip back to base)). Then you'll be at a screen where you can return to the game, resupply ('Merchant'), or quit to the main menu. This is a common response I've gotten, so I'll look into making that clearer in a future build.
The final score page has a little bug where it uploads your score, but it only takes the score from the last time you were back at the base. It's a really simple fix that I noticed right after the deadline. It should project the amount of 'funds' you have when you die, but I just forgot to carry that information over there. So yes, it is based on how many enemies you kill which equals your funds, but you can subtract from your funds to replenish your energy.
Ah yes, the enemy models... I so badly wanted time to throw something together for them, but I just didn't have the time in the end. I almost recoloured the player ship and used that for the moving enemies, but I came across some issues with that too. 

Thanks for the feedback, I'm glad you had fun with it! I think some more variety to the enemies would be pretty cool, yeah. I had a few other concepts in mind, but that deadline is intimidating, Haha.
The repair shop is a common thing being mentioned. I agree I should have made it more clear on how to access it and I'll play with some solutions for that. As for picking up where you left off when you get back to maintain the flow of the game is better too, yeah. My thoughts on sort of resetting everything has two purposes: firstly, that it plays with the theme a bit more to start off slow and "turn up the heat," when the game picks up. And secondly, it is kind of like, you are in enemy territory and then leave. While you're gone the enemy is rebuilding back up their defences, so when you get back you have to punch through their mine field and turrets. But I think it would have been more fun to just jump back into the heat. Thanks again.

Thanks for checking it out! I'm glad you had some fun with it. Yeah, those moving guys are tricky, if you end up trying it again, one tip is that the enemies can hit each other.
Also, for the bug, yeah haha. I know exactly what is wrong with that too. It's a simple fix, but I just didn't quite have the time correct it lol.

Thanks for checking it out! I'm glad you had fun and enjoyed it. Yeah, those moving guys are tough to get around for sure. I agree that if I set up aiming with the mouse, it would have most likely made it a bit easier. One tip for taking them out, is that they can actually shoot each other if they are lined up properly, but it's hard when they are moving to random locations.
As for getting repairs, aside from restoring some energy between each wave, you can press the 'P' key to pause the game and select the retreat button (as long as you have >25% of your energy remaining) and it will send you back to base. When you are there, you can select the Merchant button, and that will subtract from the funds you've collected and add to your current energy.