Pretty fun, reminds me of Verge by Kpulv. The health mechanic seems a little punishing especially considering you can't tell ahead of time where you need to go by looking into the underground world. Often you'll need to speculatively waste a health to look, then restart once you know which way to go.

Awesome concept, well implemented! Like it a lot!

I thought this was going to be a basic platformer, but the swapping mechanic came out of nowhere and really surprised me. There are some really cool ideas with the color-swapping going on here.

Seems like an odd choice making down the jump button for orange, and your acceleration seems to be backwards once you're upside down. Otherwise, fun idea, nice game.

Good idea with changing color by lose overall health. Beat this game, but somehow I won without defeating boss.

Cool concept. Reminds me of ibb and obb. Good work. :)

I like the upside down platform world mechanic, but like others have said, the health is very punishing :(

Wow, thanks for the comments everyone. Sorry about the health system, I should've put more thought into it and focused its purpose more (among other things).

well done, sir!

Interesting.

Really innovative, and there's a nice "show not tell" aspect in the second level. A nice gradual addition of elements keeps things fresh, but it is a bit buggy (I beat the last level several times without doing anything).

I really like the way this plays, the momentum felt really great!

Really fun. Love the art. The player looks so cool. I love how you can go underground are stand upside-down, its cool. Good job!

I like the mirror-ed worlds concept, but not taking damage just for switching from one to the other. It's a bit glitchy. I got stuck in walls a few times, and had a hard time figuring out where I was appearing on the other side sometimes.

It's a good game but that jump sound effect destroyed my ears

Pretty fun, reminds me of one of my games.
I really don't get why I would receive damage for changing surfaces or why I can't jump with the same button on both surfaces. But overall it's pretty nice!

Great concept, but controls are.. hmm.. weird =/

Clever concept, I didn't like the graphism, but the level design was great and it was fun to play. :)

nice idea and simple, i like the idea of using the gravity, good work :)

Nice concept !

Good game overall, original inversion mechanism! I think the health punishing is good, but you should add a key for restarting the level. I got stuck in the level where you have to shoot red balls into blue walls, since when I was too close to the blue wall, the red ball went through and I had no way to restart the level or to die.

This is a brilliant concept! Nice work getting the "flinging" feel nice :D

I liked it, but I think the boss is glitched, you don't seem to have to hurt him to leave the last level and win.

Very cool idea. It's crazy how hard it is once you go upside down.

Very innovative! I love the idea! Very fun puzzles too, this is one of the few games I played for a really long time. Great job!

The swapping mechanic really pleasently surprised me! If you will develop this further I would take out the health mechanic (at least for the swapping) and make the enemies less difficult (I could only get through the first two levels with enenmies)
Overall really great concept and well executed. There's potential here :)

Falling down into the other world for the first time was a very pleasant surprise! Unlike a lot of other people I think the health loss is a good way to add a layer of complexity to the game, and even if I didn't know what was on the other side the level layout was often enough for me guess where I would have to jump down.

How you played with color was interesting as well. Having a sort of matter/anti-matter system where opposite colors cause damage felt more intuitive than I would have guessed. One thing that bothered me was that when I held a ball and turned around the character would move slightly and this often caused me to fall off ledges. Other than that, great game!