This game is free software with the exception of the game assets. Read the full license: COPYING .
The full version of the game is free for GNU/Linux. Get it at Gamejolt.
The full PC version of the game can be modified. You can modify the levels or create new ones and share with your friends. Check the guide.
The source code of the game is available at: https://github.com/jorgicor/planetvc .
When I started programming games, my teachers where the source code of Wolfenstein 3D and Doom from ID Software, and Diana Grubber's book Action Arcade Adventure Set. For that reason I am very grateful to them, and I release the source code of this game in the hope that it helps others.
Contact: firstname.lastname@example.org .