Very good game! At first, my first thought was "The percentage I'm getting close to Earth is very small, this game is going to be very difficult." But I focused on gradually acquiring all the possible upgrades (including the music, OBVIOUSLY), and after a good while of playing, reaching Earth was a pleasant stroll. When I was at 94% of earth, I was worried about my ship because I got hit by an asteroid barrage and it drained my charge considerably, but I arrived without any problems.
I think it's very well balanced and I like that even if it's very small, you can immediately notice in-game when you're getting improvements. Pixel art is simple but works perfectly visually. The music doesn't become overly repetitive despite the short loop and relatively long game for a jam game, and I really liked the feature of being able to purchase extra music. Good Job team!!
Edit:
I realized near the end of the game that I could also use W and S to move! I think the game would work perfectly well without using those two keys.
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thanks a lot for super in depth and nice comment. I really appreciate you playing the game and giving some feedback.
glad to hear you enjoyed it as much as you did, it always makes me happy to know somebody enjoys something that I created. One of the most rewarding feelings out there.
I setup the controls such that either the arrow keys or WASD could be used to move around the screen to allow people some flexibility with the control scheme.
thanks again for playing, and have a great day :)