It's already been said but needs more blood :D The stalling mower adds a good degree of challenge. You could add to this further by allowing the player to have control over restarting it, through some kind of minigame (button mashing?). I did find it hard to see where I was going when moving down the screen though as the character seemed to get lost behind the UI but some adjustments to how the camera tracks you could fix that. Well done!