Trailer:
A couple gifs:
Blocky Balloons is a block-pushing "sokoban-like" puzzle game. Push, slide, and undo your way through 40+ puzzles to get those balloons! 
Game page with a free demo and more details: Blocky Balloons (for Playdate) by Brando
Features:
Autosaves, after every puzzle. A full playthrough can take 1.5~3+ hours, depending on your experience with puzzle games and how much you want to complete.
Goofy little cosmetics, unlockable through normal gameplay (no microtransactions, or megatransactions).
8+ beepy boopy music tracks, which can be muted from the in-game settings menu. Soundtrack download (320 kbps .mp3 files) is available alongside the full game.
I had a lot of fun making everything in Pulp. I started to feel its limits near the end of development as I tried to cram more and more features in while optimizing for on-device performance, but it held up! Great tool. Looking forward to trying the main Lua SDK next!