This is a simple(kinda unfinished, but playable) game, where you need to:

1.Collect Silly Guys, by using LMB.

2.Put them into a furnace by holding RMB near it.

3.Sell them by pressing "E" on a SELL button.

No, there is no end. You goal is to sell all ceratures on the level(or, at least 50).