Hydrium Bubble is a Java Based game that let your mind relax.
In the game, you are the blue balloon. You move by releasing little puffs of air left, right, up or down, which sets you floating off in that direction, coasting until you release another puff to change directions. You can slow down and stop with a sort of brake.
The strategy comes in by each little puff of air you release costs you a certain amount of your balloon air. Your balloon starts big, and gets smaller as you maneuver. You need to conserve air by not being too aggressive. If you run out of air, POP, you die and you have to start the level over.
Credits to Geardome.