Ryuukuro
recommended this
When I was 9 I took a weird gymnastics class as a fitness center near my house. It was a weird class that taught me nothing except for patience because, once the "class" was over, I could play this game. "Crystal Castles" has a wizard bear fighting trees, vertical standing centipedes, and a Skeletor. Wizard bear is a BOSS. Play it for free and remember the good old days.