PowerPig an another excellent homebrew GBA game developed by the same developer who made the fantastic Holy Hell game for the Game Boy Advance. PowerPig is a very well made puzzle-platformer developed by genecyst.
You play as a pig that is armed with a gravity gun that allows you to carry anything on your characters shoulders. This gravity gun is powered by coins, these coins are something that you collect throughout the levels.
In the upper left hand corner of the screen there is a green bar that indicates how much power the gun has to use. You need to be careful of how much you use as you require the gravity gun to be able to defeat the various different enemies.