Keeping it short, it was pretty good. Precision-platformer hard but good. It's also a metroidvania, and I made a review of it here (though mind spoilers): https://thebrainbin.org/m/defeat_the_backlog/t/1415043/Just-finished-Overseer-A-game-for-when-you-want-a Also hadn't made a post for them, but I've been on a streak since November, finishing at least one game each month:

Metal Slug 5 and Portal 2 both finished on November 25 Half-Life finished on December 5 Nicktoons Unite! finished on January 3 after much struggle Castlevania 1 finished on January 7, and it felt less painful to complete than the game above Battle for Volcano Island and Super Skeleman around January 8~10