I made it to the fourth planet, but I'll definitely give it another try later to finish the game!
Out of curiosity, as the creators of the game, how long does it usually take you to beat it?
P.S. I really love the pairs of antigravity planets. They feel like "launch pads" and make a lot of sense!
Edit: I did it! However, I think there might be an issue with the timer: it says I finished the game in 5 122 seconds.