Fun wave attack platformer with nice game loop.
Although I wish there were more upgrades, and store options(maybe how the king looks etc or weapon skin) it does have an upgrade section and a store where you spend your diamonds you get killings enemies.
There is a good variety of enemies for the price/time ratio and it is definitely a good time wasting game if your on a trip or something along those lines.
For the price especially on sale you cannot go wrong so I recommend it.
Hopefully someday the dev can add in DLC or updates to expand upon the great base ideas.