Really enjoyed this one! Probably my second-favorite of the first 5 in my queue. It's not as flashy as some of the others, but the game has so much charm!

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This is my rubric:

[ + - - - - ]      1 - Missing
[ + + - - - ]     2 - Somewhat Present
[ + + + - - ]    3 - Present
[ + + + + - ]   4 - Well Done
[ + + + + + ]  5 - Outstanding

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I love that the entire time you're concerned about the level of oxygen you have! I can't count the number of times I was like "Wow, glad I got back to the station; guess I'll have to hang here for a bit 'till my health is full again." Not just that, but it gives me some time to "take a deep breath," offload my loot, and plan my next excursion. Well done all around!

Gameplay (4/5)
[ + + + + - ]

I would give it 5 stars if death didn't feel so punishing T_T after the second time losing my upgrades I gave up. I would have liked to have an option to trade for each upgrade more than once so I could store it in the chest. That said, I'm bound and determined to play it again until I get to the end of the trading tree! XD

With a little more polish and maybe more worlds I'd buy this baby from Steam for a couple bucks.

Implementation (4/5)
[ + + + + - ]

Works like a dream! There are little things with the *feel* of the game that prevent me from leaving 5 stars. It felt like I had to walk away from the inventory system because I didn't know how to close it. Same with the text bubbles. Trivial perhaps, but the feel of a game is important to me.

Presentation (3/5)
[ + + + - - ]

Love the presentation! Everything feels authentic; the music, the sound effects, etc. Great use of your assets. The reason I didn't rate it higher is because there's nothing here that stands out. Perhaps smoother tile transitions between biomes could help; although I know that's a lot of work. More intricate animations for the monsters, perhaps? Honestly I like it where it's at. For a 10 day game jam I'm happy that you achieved what you did in the presentation department. It did nothing but contribute to the overall aesthetic of the game.

Creativity (5/5)
[ + + + + + ]

What can I say? Who would have thought that you need oxygen to venture forth and kill alien snakes and mushroom monsters with throwing axes and ninja stars? I sure wouldn't have. In fact, I changed my rating from 4 stars to 5 stars because... as far as creativity goes, what more could you ask for?