If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Enter into this drawing and join battle against all the items you'll meet between the lines. Fortunately your ammo is unlimited, so you can keep on shooting without running out of bullets. Your number of lives (the hearts down on the left) isn't unlimited, though, so be careful not to be hit by fragments or by the items themselves. Shoot at all targets, and try to make them all explode to create a huge chaos. Your screen's getting fuller and fuller, so be quick and try not to be hit. Good luck and enjoy!