Think of a Game Boy block-puzzler and Catrap probably won't spring to mind. Yet this obscure old handheld game deserves your attention.
While Tetris has you forming lines, the blocks here must be shunted around a stage so you can find a path to defeating all the monsters.
While Tetris forces you to think quickly, here you need to survey a stage and think of a strategy. And if you get trapped between blocks or can't reach a monster you can rewind time (apparently this was the first game to have such a mechanic) and try again.
It's far from easy. There are 100 levels and starts to get tough after 20 - Catrap is challenging and addictive as all good puzzlers should be.