A first person gravity fiddler. To advance, you need to guide rockets to their targets using spherical potential fields. And no, it's not like Portal. That much. Force: Leashed was originally done for the 7DFPS challenge, but it kind of didn't qualify since there was no shooting! After that, a more polished version was entered in Assembly 2012 GameDev competition, and got the 2nd place.
This video shows four different levels from the game, the first two are mostly introduction to the game mechanics.
The game is available for download for Windows, Linux and Mac.
The version featured in the video is Force: Leashed r13.