Cool little mechanic. Especially the option to contract the spike ball only partially. Combined with the bounce of walls this allows for some sneaky attacks from behind cover. I would have liked the shurikens to be designated to a key instead of the double jump. I ended up just using them on accident because I just wanted to gain some extra height. A continue option in the pause menu would have been nice as well!
The bouncing ball and destructible terrain reminded me a lot of brick breaker. Maybe a little more intentional design to allow for cool chain destruction.
Good job and thanks for your lovely comment on my game <3