Aesthetically very pleasing game. I especially like level transition effect, menu, gems jumping from the chest and animations. Overall feels pretty polished and reminiscent of old games. While controls felt solid, I think in this kind of game it would work better to have faster stop time like in Mario instead of having slight sliding after you stop running like in Sonic. I wasn't sure if pressing down was redundant to collect items, maybe removing it could be an interesting experiment to do. Overall quite a lot of levels combined with good controls/features make for a solid old school platformer.