I really liked this one! The art style is wonderful. However, trying to do the secret ending is difficult due to the fact that you do not have a savestate. If you die, you need to start the game over.
This wouldn't be an issue otherwise, but it takes 5 minutes to get back to a specific secret. It starts to feel frustrating to spend so much time just to try again, especially in a game where you get taken to the beginning of a stage if you die.
Otherwise yes, game! Play it.