Thanks for the comment!
The game is harder than I'd have liked it to be, perhaps it should play much slower, or the character could have special abilities like you said. As for the theme, my idea what that although space is infinite, in order to progress, you must stay in the "limited space" near the sun. Overall, I appreciate your feedback. After the jam I'll try to improve upon the game's mechanics, level the difficulty curve by a lot (lots of people said the game was too hard).