Gameplay: What would you do instead of D+Right Click? Im sure a lot of the bugs came from the fact that when I found something wrong I had to change it for every single level but by the end I was optimizing it more but if you go back to the menu then back to the level it resets.
Graphics: I made a star background but it was too distracting. Also I dont think I should do the particles because on the game page it says "Earths spaceship is lost in space with no fuel" so that might not make sense but thanks for the idea.
Audio: Thanks I'm glad you liked the music. The SFX were too loud because the engine I use WADE doesnt have volume changing yet(but it will be in an update soon) but I made it so you can mute SFX and still listen to the music
Overall: Im glad you enjoyed :)