[pygame] My solid tile detection doesn't work

[Kris Schnee]

I assume that the problem you have is that the player draws over
different tiles than the attached code is saying the player is moving
over? 

Another thought: could you be reversing the X and Y axes, selecting tile 
(4,2) when you want (2,4)? Add some print statements and get a few data 
points for what tile you clicked and what actually got selected.

Kris