Hey!
The game looks very nice and it was really fun to play it. The art is really cute, the SFX are nice and overall it is a very well done game.
If you want to hear some feedback, here's mine: The only thing I would change to the game is to change the camera position and move it down a little bit. The subject is the player character and the player needs to see the character and the ground. Sometimes I will actually see a lot of sky and background mountains but not really knowing what is in front of me.
Nonetheless, great game! You did an amazing job and it's awesome you made it alone!
You need to extract it using WinRAR or something. It's an archive, in it is the game folder.