You obviously have great taste, because a ton of your feedback is already implemented! The overworld theme is done, energy ball projectiles are always blocked by walls, getting out of petrify is easier (you're intended to mash the movement keys but I've made it less strenuous) and coins have a new more satisfying collection animation in the game on my end. I'm planning on releasing a 1.1 version of the demo with all of this and a new boss ASAP :)
I'll post some more thoughts on the thread.
Thank you so much for playing!