The aiming is terrible (it's hard to tell where your shots will hit given how fast the enemies move), movement is too fast and hard to control, the camera is zoomed in too much and tilted downward a bit too much, jumping is super-weird to look at if you jump from diagonal terrain, but most of all, this thing isn't worth $2 when there are way better free titles out there. Game jam games shouldn't be charged without significant development post-jam or else that's just ripping people off.