This is the sort of thing I want to see in an arcade style game. Even though it's likely not a new idea, it still is done very well.
There is a problem though. Difficulty is way too hard for even the first enemy. This can be fixed with a scaled leveling system, and it can make the game feel even better.
But this is a good concept! Good job on this Game Jam, I also don't mind there's no sound. Maybe in an update, but sound can easily ruin a game for me if it isn't done well. Good luck!