Wow, that was innovative! I think you can use that basis as foundation for many different games, from multiplayer/single player shooters, brawlers, platformers... I think you got something interesting here! My biggest complaint is how rough the shooting was. The projectiles never go to where the pointer is, you have to miss the first couple of shots until you get the right angle and by then, you might be out of bullets. The bullets mechanic felt a bit out of place as well, maybe a normal reload mechanic would be better than sitting around waiting, especially when you can't aim. The yellow blob felt a bit unfair too, he was faster than the player and way too tanky, giving him invulnerability frames made it feel like everytime one spawned there was no way to avoid taking damage, you can't kill him before he gets to you. But yeah, I think you poured most of the work into making the gravity and moon jumping mechanics working. With more polish, you can create something unique out of this. Really good!