I'm glad you enjoyed my game and that you noticed the two largest influences for my game!
I'm also thankful for the feedback! Small transition cutscenes between levels was something I was considering at some point, but had to give up on due to time unfortunately, though I will consider improving the indication if I update the game in the future. Balance was also something I struggled with, since I wanted to make the game slightly challenging but still fair, when not using Room Service (or the cheat codes), but didn't want it to be too easy when using Room service. I will look at fixing up the balance potentially in the future. Also thanks for the feedback on the bug with the coin, I will try to look into that.
Anyway, thanks for the feedback and thanks for playing!