I could have helped but im busy right now
Still I can give you some tips.
Do you want to still use that font type or are you inclined to change it? I think much of the problem about the logo is the boring font you have used. Watching your game done by crayons is like a kid drawing a space adventure, something that the logo doesn't represent very well.
I would find a cool sace type font, but still simple enough, and instead of just using the font, I would draw it all by hand and with crayons, with some type of perspective maybe, and then scan it. Could look pretty cool.
Same with the fighters, try drawing a fighter with crayons like a kid would, instead of using the assets, and then scan it. Something like a kid trying to copy the fighter on the star fox 64 cover art mixing it with some star wars because he things its cool. Of course everything very simple, and using yellow only like the one in your logo.
The planet below I think needs to stay if it represents ZaciSa, even in the horizontal banner.
Would have tried making you something like that If I had more time, sorry
but I hope at least I can help you with the tips.