NOTE: this game was tested on hardware using the Visoly Flash Advance Linker from Lik-Sang.com. The emulators are pretty good, but hardware's the best way to play it.

A (Z in emulator): Swap
B (X in emulator): Push
Start (Enter in emulator): start, brings up menu, exits menu without making a selection
Arrow Keys: direction

Select a game type from the menu. If you have not played before, I recommend tutorial. It's a quick way to see some of the environments (rain and clouds are in levels two and three), and it will give you an idea of the basic rules, which are:
a) If you get four or more blocks of the same color together, they disappear.
b) If a monster of the same color is standing next to the blocks when they disappear, he'll disappear! However, he does not count towards the four block count.

Story Mode:

The levels are specially designed to challenge you. Some have time limits. If a monster eats you or you run out of time, you restart the level. If you can't beat a level, you can go to "skip" in the menu if you want to see another of the three levels.

Arcade Mode:

Currently, if you "lose", it takes you to the next level so you can see all three levels. Also, if you glom more than four blocks together at once, you get a superstrength powerup! It lets you move immovable blocks, or push two blocks at a time.