No, seems like a bug. The default controls should be Z - Jump, X - Attack and C - Dash. Probably happened because of the last minute control system we tried to add, and it's only on the HTML version of the game. If we can rollback during the jam we will, the version is uploaded but unselected. Also, are you not able to change controls? Just type in the key you want to assign, if this doesn't work properly please let us knoww.