The object of the game is to guide your bug along the paths to eat the paths where the flowers are. If you eat all the flowers, you get to the next level.
To guide the bug, shift the garden tiles to recreate the paths, as the bug follows the paths to the flowers. Use the arrow keys to slide the tiles to the empty square, and this way alter the paths.
Beware of the other creatures in the garden who are trying to stop Buggy.

Good luck!