I really like the graphics, the animations, and the way in which you scale up/down and it controls the physics making you jump higher, be able to break things, and reach areas that you need to be a certain size. Always enjoy when the game lets me skip levels and quickly retry them. My one feedback is that the tutorial text is really easy to miss but at least you've done a good job at teaching the mechanics through gameplay except for the scaling of the portals. I would add a "drag me" above the first portal to make it clear for the dumb people like me :D