I spent 3 days making this game.
This is a regular platformer but you can collect stars, go on rotating blocks, use keys to unlock doors and go in portals!
There is nearly 800 blocks in this project.
Note: If you went past the door in level 10 (last level) but didn't reach the next level (end), you'll have to do the whole game again since the key is one-time usable and the door closes after you get past it.