Gravitron

http://i.imgur.com/MWgiDmp.gif

This Gravitron tech allows you to invert gravity on your character. Unfortunately I haven't done sprite rotations yet, but when you hit the F key, your character will be pushed upwards and away from the planet or wherever he is. Pressing it again reverts it to normal.

This can be really useful for mining ore above large chasms without having to build a path to it, or for just moving upwards very quickly! In order to abuse "flying" via toggling it on and off quickly, the cost of activating it is somewhat high, but the drain while it's on is somewhat low to compensate.

As before, how you get the tech into your game is up to you - I've only included the tech files.