Defend your castle!

Well, it's not yours but you were assigned to defend it so don't let anyone pass through that doors.

It seems like waves of enemies will be trying to enter the castle and you must kill them all. But it won't be funny if you do it alone, so the nobleman living in the castle has granted his magical water gun. 

Its water provides your tropes with the strength and the vitality of the ancient warriors, but if they dry out, the effects will pass so keep all of them hydrated. Your enemies will be affected negatively, so don't forget to keep them hydrated!

Survive as long as you can!

Submission for the MicroJam18*

The controls are simple:

Click: use your water gun.

A: move left

D: move right