I had problems initially with getting stuck on walls but I thought I fixed them, seems I missed something there. Thanks for mentioning it. I have an idea what could cause it but i'll check. Best way to avoid it for now might be to not walk into a wall while on ice.
The graphical thing is some issue with Unity's tiling system, I think. When I playtested, it wasn't too bad, and I was running out of time so I decided to leave it.