Nice concept, you could develop this and make it into a full-length game!
I have some ideas
1) Disappearing blocks
When you touch them, they fade away
2) Buttons
By standing on it, it would open a gate.
3) Boxes
You could push boxes onto buttons, and change their gravity as well
4) Canons
Canons would shoot spikes in the direction they are facing, and the bullets would not be affected by gravity. I have an interesting puzzle idea: The cannon in this level would be shooting up, and so trying to pass would result in you falling on the bullets. To pass you would have to change gravity to go on the Z axis, so you can jump over the bullets.
I have some more ideas that would be helpful but it is possible you have already rejected them:
1) WS
I know that some of the puzzles rely on this not being a thing but... I think it would allow for more freedom and puzzle combinations to be able to move forward and back with WS
2) Camera Controls
This would allow you to change the direction of where the camera is facing, possibly with the mouse. Maybe also a camera reset button, which would be helpful for knowing which direction you would change your gravity in
Amazing concept! Die to gain health so you can fight the bosses!
Figuring out how to die is really fun! And every enemy is unique.
The final boss is YOU.
I had alot of fun playing this game. I only had a few issues:
In one of the levels you have to fit yourself in an almost impossible gap. I did it in the end, but it was hard.
In another one of the levels, you have to go to the left of the screen to die. My mind usually associates the bottom with death and the sides with next level.
It was the only place that I maybe could've considered a death area, but it was still pretty confusing. If you were to update the game, I would put spikes in the death areas.
Overall, the game is great! It was really fun to play, and it wasn't too hard.
The game has a really nice concept. Control the enemies and make them lose.
While playing, I NEVER guarded as I felt like that was a waste of time when you could be losing. I'd much rather attack.
Speaking of time, I felt like it took way to long for things to happen. It's pretty frustrating. If there's anything in the game I would change, it would be this.
Besides that, this game is amazing! I love the art style and music. The beginning music feels silly and fits the visuals. The battle music is good too!
