For 23 hours, this is a decent game.
I'd personally give this an 8.5 (mostly for the fact you made a decent game in less than 1 day of making it in the Unity editor), but since NewGrounds doesn't let me give 1/4 of a star, an 8 you shall receive.
My only criticism is that the game is a bit hard on your first play, but honestly, kinda expected tbh.