Thanks for giving it a go on your stream! I watched you play and it was really helpful!
In the recent update I introduced a hint to collect the reward and fixed the issue with it being unclickable while a crab stands behind it, but for the next one I am considering blocking doors until the reward is collected.
As for the music - 100% agree with you. I have a track in production, but it didn't make it into this demo, unfortunately.