interesting and addictive game, although the game malfunctioned for the second part and froze on level 8. for the first part, i think the difficulty is about right, but for the second part, i think moving back seven loops is too harsh on the player. also, i wish there were another key for invert, since by instinct i use space to jump. additionally i overlooked the “shield” part for a while since my eyes were fixed on the center of the screen; maybe a clear outline to the player to show that the shield is active? but overall a polished and fun game.