Hello Zeno, I am very happy to see you liked the game.
About your questions: at some point I tried to sell the full version of the game, and thought that trying it on browser would help with that. After a few months nobody was interested, so I decided there was no reason not to make it free. Since it is very easy to remove the price I just did that. However, I didn't built a full version for the browser for the same reason I do not intend to do bug fixing, which is that this barely gets ever played and is not worth it to keep working on.