Dug this heaps! Very cute style and I loved the unlockable characters, that really added a feeling of progression to the game that kept me playing. Some of the randomization imo needs tweaking - large walls of blocks are semi-regular - and although you can easily navigate them if you get a handle of the controls it is just a bit broken. I also sometimes got giant clusters of enemies which again, easy to avoid but looks silly ehe. The controls are good but a little floaty - I would consider making it a three-track runner and locking the character to tracks, this might give you a much better more polished feel and maybe increase playability. Just an idea. Great work!