This was a really nice little game!! I really loved that the aspect ratio was a portrait size! That actually felt really cool, and the style of minimal colors along with the isometric camera perspective was very appealing. And the death animation was almost as satisfying as the gameplay itself, it was very clean feeling!
There were a couple of issues I found however. You can jump infinitely because I would assume the ground detection wasn't working. On top of that I would just say that it'd be nice to have more variety in obstacles. Other than that it was a great game!
Maybe add some music and sound effects and I think this game could be pretty successful! Keep up all the good work my friend!!