Chill metroidvania.

Combat is fine, mostly there to break up exploration. You're very mobile, but the controls aren't super precise. Most enemies are a bit boring, but the bosses are fun to fight with a couple of exceptions. The moveset upgrades you get as you progress don't increase the complexity of combat, the abilities are mainly for traversal.

Level design is very simple as well, but has substantial variety between areas. There's some wasted space and rooms that could get cut down without sacrificing much, but altering those layouts would've probably messed with the game's gimmick of connecting entire levels together into one big map over time. Enemies should've repeated less between areas though.

I can't think of any issues with the other systems. QoL is fine, the upgrade system is inoffensive, the overworld flying sections are brief and pretty good, the game takes a very generous approach to checkpoints in that dying doesn't erase your progress and only relocates you to the last save point.

The presentation is very cute and the music is very good - some of it will probably end up on my sleeping aid playlist beside Ghost Song's OST.