Painter Momopie (GB, JP) 1-Credit Clear

Final score: 137,500
A super charming gameboy puzzle game release by sigma in 1990. Thanks ‪@chris1cc‬ for the suggestion!
You take control of Momopie trying to clean up the castle while avoiding some weird monsters, mouses and jason.
The game actually follows an arcade style of gameplay with limited time and 33 boards, matter of fact it's actually only 17 unique levels.
each 6ish floor you get 10k pts (the game is every extend) some extra mana and a random powerup, problem is: most are terrible or glitched... the list goes like:

- "Speed" 10MP: just a speed up for 7 seconds, really good.
- "Pyon" 20MP: one of the few way that you can kill enemies, it's good.
- "Shield" 30MP: this one is glitched, it doesn't do anything? i'd say avoid this one.
- "Timestop" 40MP: Stops time for a bit, but the enemies still have hitboxes, it's just a waste of MP.
- "W. IN" 50MP: phase thru walls for 7 seconds, really handy for the ghost board.
- "Friend" 60MP: Glitched? doesn't do anything.
- "Clear" 70MP: Cleans up the nasty drops that some enemies leave, it's really good at end game.
- "Sealed" 30MP: I have no idea, Never seen this powerup during credits ^^;
- "Bom" 80MP: This is just broken, smart bomb that kills everything, a must have.
- "Ghost" 30MP: Gives I-frames for 7 seconds, poor man bomb, it's alright... I guess

The best powerup is speed and "bomb bomb", serves as an actual smart bomb that's really good
other really good powerups are the pyon shot and ghost, the latter allows you to phase thru walls for 7 seconds.

The gameplay loop is really clean and fun, but it suffers from heavy inputlag due hardware and some really janky or impossible situations.
The general strategy is learning each cleaning pattern so you can manipulate the spawns in this way.