I'm not very good at promoting, but I'll give it a small shot.
The Happiness Rainbow shattered on a whim, with its fragments plummeting across the whole island. Take control of Hakkun, a transparent, bird-looking, adorable blob. Inhale blocks, collect all of the Rainbow Shards and bring the rainbow back in its original glory.
Why am I doing this?
The Sutte Hakkun games for the Satellaview are somewhat obscure, hard to come by, or even emulate. Although a single cartridge version does exist, it rarely if ever gets re-released and is still not localized.
All in all, it's a shame. The simple, yet intricate puzzle gameplay is fairly suited for a browser game of today.
The final goal (if it even reaches something more final) is remaking a good chunk of the game, as well as enhance it with Quality of Life features and accessibility settings.