Unsure if this is a known issue or not, but I felt it was important enough to point out. I was just playing again, seeing how far the demo went, and I hit pause during the transition between levels. When I arrived on the new screen, the character was in a sleeping position on the ground and I couldn't move. I hit pause again and he was upright, but things were dark. I unpaused and...honestly it looked somewhat nightmarish for a Sega game. Everything was blacked out or really dark, the path you walk on was barely visible, and his eyes were missing.
Basically, I broke the game by pausing it between stages.