Very interesting.

This looks like the start of something nice! Obviously there wasn't room for much besides a basic progression and test of mechanics but I can see it going a lot of places. I'd love to see some mechanics combined, like levitating a platform and then doing a moon hover from it. Or even levitating enemies as a way to solve a puzzle. Good job!

Nice mechanics. I can imagine them being used in some really challenging and fun scenarios.

Holy shit you can walk on slopes!

Neat mechanics!

Although visuals are not the best and it clearly doesn't have any sounds, you had everything a platformer should have and you implemented all the core mechanics you needed -- use of gravity, smooth character controls, shootings, etc., and they worked perfectly.

As a programmer/designer you've definitely achieved your goal, and if we were in a team this would be a totally acceptable prototype to show to your art/sound team, and it definitely has potentials to be something greater.

The mechanics were so good, I was surprised at the gravity one specially, I'd say that if it had music, better animations and art this could be a very good game.