The game did a lot with just a few things, which I was impressed by! The gameplay was a lot of fun thanks to the gimmick involved in platforming. I also liked that spikes don't pulp the player from the sides, which might be an often-missed design flaw in some other games.
The music was also well chosen, and it sounded like there was a lot to fill out the playtime. As for writing, I do find that there is a common pitfall with presenting text in a game. There's a variety of ways that text can be put in a game smoothly, although a lot of it involves creating dialogue - even if it's Shinmy's inner thoughts - or in some way spacing it out between bits of gameplay.
As is, however, this was a very impressive game - especially so if this was your first and a solo project. Well done! *u*