Very cool game, the fuzzy little graphics are great and the subtle camera movement along with the little particle effects are super cozy.
The main problem with it is that it seems very random, and like you don't have much of an impact on how well it launches.
Having some other mechanism than the WASD combos, like timing the right moment in the swing, or something along those lines would likely work better.
Or even keeping the WASD, but needing to time each to hit the right moment in the swing, and each consecutive optimal timing would give an accumulative multiplier to the launch speed, and it adjusting the trajectory based on the average of all the hits, would probably make it a lot more fun.
I just kept hitting space and waiting for the score to pile up enough for me to upgrade until I could reach 1km.
Fun game, great graphics, nice sound design on the one sound that's there, could definitely have some extra juice, but the main improvement to be done is the gameplay loop.
Great job in the allotted time.