Yes! I beat it!! One strategy is to let Doggy orbit the planet for some time (except the sun unless you want to hear the G.O.A.T. sound). Doggy doesn't actually need refueling (I think) but he will fall faster on planets with less water. The control is simple yet difficult to master, and I like it! Also, music becomes epic in the end game. My hands become sweaty there.
The only complaints would be that screen shakes can be too much, especially for me who gets dizzy very easily. The glow effect will get stronger overtime, but it resets when Doggy goes to the water planet. So we can say it's refreshing :) Good job!