Snack and Warp

Snack and Warp is a worm that grows with every apple it eats, in a game where growing is the problem. Your own tail is the obstacle: it has to fit, it has to hold its own weight across gaps, and it blocks the tiles you came from. Crates can be carried on your head and warped through paired portals, and a blade apple cuts you into two worms that can be switched between, one holding a button down while the other goes on. Sixty-seven levels, and the later ones are genuinely clever.