Short and sweet game, nothing particularly innovative going on but the level design is solid and getting all the collectibles is very fun even if they don't really lead anywhere. Pixel art graphics are pretty, cutscene graphics are a little janky at times and not very animated. Music is really generic (absolutely loathe the bonus stage one). The difficulty is really nicely tuned and I never felt live I've been cheated out of a life. Pretty good overall! Might go back to get the rest of the achievements some time.