It's... something
As a gag or a scientist being trapped in a rocket and going through some fun imagery, I like it. I'm also biased and enjoy the classic Flash cartoon style and animation of yore, even though it's technically "bad". I don't mind using Goku's hair as long as there's SOME purpose or joke behind it, but you haven't given us anything in the cartoon, so it just feels out of place. The astronaut's face pisses me off, but it would've helped to animate multiple expressions to add some substance. With the rocket's sfx, what you could've done to balance it out was muffling it when the camera view is outside. It makes sense since there's no sound in space and being inside and having it loud would help the immersion. The general sfx in the beginning would've been better if you just had a microphone and simulated what was happening for a more organic sound rather than copy-pasting the same sounds over and over again. And please study colours to choose a better palette. I mentioned earlier that I have a soft spot for this style, but it isn't very pretty to look at.