People are always saying "oh ea bad they ruined this game microtransaction bad" YOU DON'T HAVE TO PAY FOR ANYTHING IN THIS GAME IF YOU DON'T WANT TO. Look past that and play the actual damn game, which is really really good.
One of the best fangames i've ever played in my life. Visually and audibly, its perfect. Soundtrack is amazing, and spritework is gorgeous. However in the later zones, the level design can feel a bit repetitive, but you can look past that because everything else in the game is peak.