Hey!
First of all, amazing work! I love how cute the game looks and the gameplay is very smooth. You did a very good game design decision by making that after you discover some hidden platforms or triangles they will remain visible. This way, the player does not have to remember the level layout. Really nice touch.
The only thing I would improve will be the sound track, maybe make it a little bit longer. But other than that you made a really awesome job. It's very nice to see what you managed to make alone the whole game in one week! Congrats!
I would love to have you playing mine too, if you don't mind of course! ^_^