Really cute little game which had a very nice core mechanic and great pixel art! The way in which the music changes was also very nice as well as the different player sprites for each state!
I feel like more levels should have been about the rage mechanic (like the last one was) rather than just an add-on that was avoidable if players were skilled enough, having said that though it definitely did fit the theme! While the experience was short it was definitely well polished and the little "Kill counter" was a nice touch too!
Overall, I definitely recommend giving it a go as its a cute and responsive controlled (aka the controls felt very good) game!