This is a 2D physics-based puzzle to sort Roman coins into their different types. When you click the start button, 20 random coins of the types visible on the bottom will appear. You need to create a sequence of ramps to sort the different coins into the correct slots. If you get them all in the right slot, you'll get the maximum 20 points for that prototype.

There are a few points I didn't manage to get into the in-game instructions:

* Right-click or click the polygon icon on the left again to finish a polygon.
* You can't create concave polygons yet (since box2djs doesn't work well with them). The game should stop you creating concave polygons.
* If you click inside a polygon when you're in polygon creation mode you'll highlight a corner. You can nudge that corner using the arrow keys to finely adjust the polygon.
* Use the pin tool to anchor stone shapes to the back wall, otherwise they'll fall off. If you anchor in one point the shape can rotate. If you anchor it in two places it will be fixed.
* The coins have different densities as well as sizes, which might help you sort them.

There are probably still a lot of bugs left - if you find any, I apologise, and if you let me know what happened I'll try and fix it.