there is no shadow of the ball, or white marker on the top to show where is the ball :) any or both of those would be extremly helpfull :) it is a nice game :D
anyway its great :) but if posible, its usefull to have that white marker on celling :) maybe to erase shadow of the net, so that it can be that the shadow is exacly down :D so that would be also work, not shoore but i think blobies also had shadow :D