Lua Experiments: Gravity Gun 2.1

As requested by that guy...... the gravity gun.... it will pick up any small/midsized nonstatic object and fire it back at very high speeds.

update 2.1:
- fixed the bug that prevented you from grabbing objects on the 3rd layer
- added option to blast away neerby objects

Joystick: aim
G: Grabs an object thats in range
F: fire object(if holding object) otherwise blasts objects away
W or Spacebar: Jump
Slider or A/D: walk left or right