It was actually a lot better on the downloaded version. It was only a small difference but that made a huge impact and I managed to get through that spike section in level 3 on second try now. On the online version I felt there was a little extra delay when trying to change gravity midair and that made navigating the spikes nearly impossible. I still think some checkpoints would be nice. Maybe use the switches as such. Also, moving the camera back a little would be great. There are some blind jumps on occasion where you can't really see the ground beneath. And I found a bug on level 6. I fell down an early gap (I think it was the first one) with the pink character and didn't respawn.