Alright, I have a confession to make. I can't finish the game. It is just way too hard, and I can't get past the entrance to the core (the place where you swing up to)
Anyways, even though I couldn't go the whole way, I did record most of the gameplay (I didn't start recording from the beginning, because I didn't think of recording it). Why did I record it? One, I'm a lazy fuck and I don't want to write anything. Two, it's just more helpful, because you can see what the player is doing.
Be aware, wall of text incoming:
1. Oh hell yea. I like the idea of the gameplay, swingin around like a badass. With some tweaks to the movement (and not making the floor SO FUCKING SLIPPERY) this could totally do for a full game. The grapple hook is the thing making this unique, so you should really keep it, but you should add more physics. What I mean by that is make shure you can swing out of a grapple, keep the velocity, land on the ground (proposed mechanic now) do a slide and get a speedboost from that, then be able to jump up from the slide and do some sort of tripplewipplefripplebackflipple. And I'm back to rambeling, feels great! Anyways, the mechanics are already (with some tweaking) really good, but more depth to the mechanics, and a higher skill ceiling would make the game much more engaging to play, because you can improve at it for longer, and that means you can have a longer game that remains focused.
2. I think my earlier comment can explain this one. The game is really hard to get into. I would have quit the game way earlier if I didn't do this to give feedback. I would have quit on the level after the cave. Just because it feels so punishing to play the game. For me the curve was no curve at all. It was a wall, going straight up, with no warning, and then it continues upwards, with no sign of stopping.
3. The music fits, but it isn't coherent. There is no bigger musical picture, it's just a bunch of songs, and that's what I want when listening to a soundtrack. I want something that is well put together. Something were each song plays a stem in the bigger picture.
4. I did not notice any hints, because I'm dumb. I have grown up in this time where games always tells you were to go, so for me it's kind of confusing to not get waypoints everywhere. I'M NOT SAYING THAT YOU SHOULD ADD WAYPOINTS AND SHIT. If you do that I will actually send a spear through your harddrive, so don't you dare. But what I am saying is that making hints a tad more obvious, or have more places where you can get info on where you should go. Because I was just running around most of the time thinking "ohh what's this thing that looks like a portal?", and strolling right into the last level and dying a billion times, before going back and finding the "right" level.
5. The game was pretty fun to play from the blue scifi thingy level to the midnight museum level (great naming, thank you, I'm a professional namer). Before that I couldn't control the character, after that it was too frustrating.
About the firewall:
Where did the checkpoints go? One second there was just enough checkpoints, so you would get punished for making a mistake, but not spend 40 seconds getting back to where you died every single time. I think I died at least 50 times in the firewall area, and after I completed the firewall I didn't really feel rewarded. I just felt relieved, that I was done with the thing. And being hit with the core after completeing the firewall just killed me. I couldn't pick up the game again after that.
Other stuffs(this was written when I was playing, so I was a bit frustrated when writing. Hope you don't mind):
The second "laserpart" in level 2 doesn't turn red and then fires, it just fires while turning red simoultaniously.
My brain is about as useful as a pea, so it took some time to figure out you could press both left and right mb.
The lasers don't seem to have any predictible pattern. It makes me want to fuckin die. And I did, quite a lot from them.
Turn down music volume when sfxs are playing.
I will dispise lasers from now on.
There is no sound except from the death sound. Makes the game feel a bit lifeless.
It is difficult to click on the blue orbs when moving, it breaks the flow.
The story is pretty darn good, and I would love to see it in a fuller game.
(Also, you have a save system. Thank you, I needed to be able to take those breaks)
Here is the recording of me playing the game. It's like 2 hours and 40 minutes, so it took way too long to upload. When you hear the sound going nuts that's when I look at the walkthrough.