`mouse_playground.py` not handing mouse events properly

[Blotz]

When moving the mouse around and holding the key such a a, the code crashes.

It appears to be an issue where the input is expected to be 'mouse:hover@81;7' but what is actually recieved is 'mouse:hover@81;7M'.
The extra M character causes the coords code to crash due to a ValueError.

[bczsalba]

Hey, sorry for the delay! Had to graduate real quick, lol.

Is this reproducible for you still? It works fine on my end, and I don't see any reason why holding a non-modifier key should influence the return value.