If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Help Dr Lee on his mad adventure. Start flying to earn cash and upgrade the rocket. Earn coins by collecting $ floating around in the sky. Blast your way into the clouds going upwards, but the main aim is to get as far as you can for a higher score. The more upgrades you get the easier flying will become.
Use A and D to change direct, E to use rocket fuel.