Innovative concept, great music, my only complaint is that there appears to be no way of knowing whether one tile will be compatible with another without trying it manually, it would be nice if there was some sort of visual indicator to show you in advance whether you can swap from one tile to the other such as a colour coded border or something. Anyway, great game.
New Update!
To help with lag you can now reduce both the amount of raining money particles and the number of displayed assets. This should ease up the pressure experienced when you get to the higher values.