Very cool game. Love the collection sfx. Some thoughts: maybe don't restart the music on player death, just start it when you enter the level and loop, may feel a bit nicer. Also there is not really a fullscreen option, screen just shows more of the game, minor thing, but you definatelly need to fugure out a way to show the same amount of game in both fullscreen and window, it can be a trouble in other projects. Overall - great job, for a one man project this is very impressive!