Sketchy Maze is 100% free to play as a shareware game, but purchasing the full version will unlock additional features.
As of release v0.7.0, registering for the full version of the game adds the following features:
Options are currently being explored in terms of payment provider to begin selling full versions of this game. Until then, friends & family get free license keys.
The way this is going to work is that you buy the game just one time and get free updates to the game for as long as I find it interesting to develop. The early releases will be inexpensive and will go up as the game gains more features and popularity, so early adopters can get in on the later updates for a lower price!
Upon registering for the full version of the game, you will receive a “License Key file” which you select in-game to activate it. This process is 100% off-line, no network connection required, I want to make sure the game still functions even if I get hit by a bus.
Future releases of the game will honor license keys generated for prior versions, except if your key is discovered leaked onto piracy websites; in which case, future releases of the game would stop accepting that license but older versions will still work.