Thank you Rooilo! Yeah, is a good idea to restart from the level. I maanged to submit 10 seconds before deadline (with errors) haha so not much time to balance the game. Will try to do so for a future iteration! thanks
I used real gravitational physics, just ignored the Comet's mass, since (as practically happens in real life) its mass is insignificant compared to the rest of the celestial bodies :). I included a threshold to apply the attraction law, that way the player wont get affected by objects very far away in the scene.