the C version is the actual updated version, someone posted it here
here is the information in case you want to know (by the way, the mushroom girl you are talking about is in the B version of the game):
For version A: its the first version of the game, it has 5 animations and an introduction of the game.
For version B: it has two enemies from the A version, but is missing 3 animations of the A version, also has an introduction (which is different from the A version), has 9 animations.
For Version C: Its the only one which doesn’t have an introduction, has 10 animations (this is outdated, i don't know how many animations does this version have) and it gets updated once per month