Use your mouse to move around and the spacebar to shoot. Watch out for spikes, bombs, and lasers. Touching a spike will hurt you. Bombs explode when you touch them or shoot them. Don't let them explode on you. Lasers deal damage every second you're inside them. Try to stay away from them. Choose a color for your theme from the options available: red, orange, yellow, green, cyan, blue, purple, pink, and rose.
