Hi!
Sadly it seems like your uploaded build as a bug? I can't seem to procced beyond the first wave.
From what I could play it seems like your intent was to have waves at the end of which you roll a dice and a random effect happens, right? I was able to roll the dice once, using the ui-button (infinite amount, but without effect by pressing k), but sadly the play button afterwards didn't do anything.
I really like the idea, that the player is building the board layout itself. With the trees that give money, the elfs that shoot and the walls that block units. I guess the bar in the bottom indicates how difficult the next wave is? This seems to be determined by the dice roll.
I would have really liked to play it in it's entirety. Hit me up if you release a bug fix in the future.