Thanks for checking out the update! I agree that the uppercut is probably the most useful attack in this version. I do intend to have ground-type enemies in future levels, so once I get there I'll probably check the balance again.
Great feedback on the boss, thanks! Maybe the first phase needs a steady glow or some other call-out to draw attention. As for the mask phase, definitely needs a rework. It felt too hard at first... but I to discovered toward the end of the jams that just standing slamming attack was the most effective strategy.
All great things to work on for version 3.0, thanks for all the feedback! Now that a lot of the groundwork is in place, I'm hoping I can push a lot further next when I get to the next update. I hope to see you then! :)