Thank you for playing! It should go to the next wave as long as no more than 12 enemies are in the house and the previous wave is done, otherwise, it may have been a bug.
Cool game! Nice assets, both visual and audio. Gameplay felt pretty good and satisfying. The player movement felt a bit sluggish, not as snappy as the rest of the game. Otherwise great work!
I am glad you like it, and yeah, I had this idea in mind since I saw that the theme was ninjas, and I couldn't resist making this. So I too doubt the game follows the no combat limitation.
Nice and entertaining game, the gameplay is smooth, the graphics and audio is great. I had a hard time navigating in the beginning of the 2nd level though.