"Gravitus" update.

Hello everyone, 

It was a great experience to participate in the GMTK 2020 Game Jame. Especially, because of all the feedback on my game, I received from other participants. Based on this, I've made a few changes to my game:

- Better control of the lander 

- Added some juice and music (https://tallbeard.itch.io/music-loop-bundle)

- Improvement of the UI, with two new indicators (number of landers used and fuel)

- Redesign and reorganization of the levels for a better difficulty curve.  

Thanks for playing!