Honestly a very impressive game for being made in two weeks. Good work!
Although the user "AlistairX89" already commented great suggestions that I totally agree with, if you are planning to expand on this game I have a few extra suggestions:
1. Definitely increase the speed of both the player and the witches as the game is a bit slow (however the slowness does gives a legitimate nightmare feel to it like when you're dreaming and you move really slow). Perhaps give the player a sprint button and once the witches spot the player they start running to the player and we can only escape their aggro by sprinting away.
2. Definitely add some animations of the witches swallowing the player. If possible a full first person inside view, otherwise (maybe both in player selection) a third person animation of the player going down the witch's throat and into her belly. Also after the player is in the belly of one of the witches, a belly shrinkage/digestion animation would be good too (upon post if this function is already in place I did not notice it).
3. Along with animations for the vore, the additions of other vore methods such as: unbirth, anal vore (if need be), and perhaps navel vore and nipple vore (as I noticed the obvious open nipple duct on the witch models). If you were to consider these other vore methods, a fun idea might be that each different witch will perform only one of the vore methods upon catching the player per game run. (I know this suggestion is a lot, so no pressure on it).
These are all the major suggestions I could think of, as AlistairX89 has already covered other good suggestions. I do hope that this game will expand and that these suggestions interest you. Keep up the good work!