Don't get me wrong, I like your game, it's good, but requires improvements to become great.
It's uncomfortable *for me* in general.
The things below are probably what makes it uncomfortable for me.
- Everything is probably too big
- Font is purely a personal preference, but the wide bold pixel font used everywhere at the moment is a bit bad. It's bold so it's meant to pull a bit more attention than a usual font would. Everything is written in "significant" font, so my eyes are pulled towards... everything? Maybe you should make the regular font less prominent? Like use a less "significant" font probably.
- Too many buttons in the main menu. You could probably put credits & settings into options, and then controls into settings.
- The title in the main menu is a bit too big. I mean, sometimes it's good to leave some spare space. Like, the "quit" button in the main menu doesn't have to be in the left bottom corner.
- I think that Picasso was right when he said "Good artists copy; great artists steal". Look at other games, how did they do UI? I think that without much experience all you can do is to look and learn.
Overall, good game, I like this kind of games. I like the choice of music, how it changes through scenes.