Collect
Fly through space as you destroy and collect various colors. As time passes, blocks become harder to break. Speed your way around and try to break as many as you can before time runs out.
Upgrade
Using the resource you get while cruising around, get upgrades that will help you collect even more. From doing more damage to blocks, making more blocks spawn, or even unlocking new colors, use the various upgrades to make every run better than the last.
Repeat
Start the cycle of breaking and collecting blocks to get better upgrades. Use those upgrade to collect more blocks. Keep going until you become a cruising machine that can collect every color you see.