Cool game! Good music and really nice pixel art!
A lot of it feels really polished! the sound was great, both the alarm and the especially the clock ticking. The buttons (next, back, pause) feedback was slick.
I had a big issue though, that the ui doesnt scale properly with screen size. I have a 1920x1080 and I couldn't see half the menus in the shop. But I can imagine that on a wide screen it would feel very polished! Another thing is that the itch full screen blocks the game full screen button - if pretty sure that's just a setting on itch.
I think it would be nice if the descent upgrade was called "descent healing +5 " and "descent healing +3". Not anything major but I "huh"ed when I saw it, before I read the tooltip.
All in all, great entry!