I tried twice to enjoy Yoku but it just isn't for me: the ball/character moves so slow when not pinballing and everything seems to be based on pinball, which for starters I don't like. It's not like Creature in the Well where your character moves normally in an isometric plane and then puzzles and etc are done with pinball mechanics; Yoku is literally a pinball game with some in between traversal (slow), on top of a metroidvania schema with backtracking (which gives the impression of being slow plus also relying on pinball which, again, I wasn't enjoying).
The game is charming and the background music is really nice, but I can't get past the mechanics (which work well enough for sure, but it's not for me).
It's a bit of a shame for me because I always want more metroidvania(like)s in the service, yet there are some that I don't play in the end, lol. I just hope for Blasphemous, which is currently NOT on sale on xbox.
Also, I tried Undermine yesterday for a half hour session (which of course ended up extending into the full hour) and it's weird. There's easy progression in terms of perrmanent upgrades to buy, starting cheap, but the gains are very little. You can't attack while jumping and it looks horrible when you jump, plus there's no evade or block. It's a bit too simple mechanically. You can easily get to a proper boss (sandworm) but it destroys you in a second, while you didn't do any damage, and if it's because of progression, well, then it should be harder arriving to it (unless it is meant for later and you should take another less obvios path first). The game seems like good mindless fun anyway, but having played very little if feels like I've already seen most of it in terms of items and mechanics.