i can place gems but am unable to set towers (although I can apparently build them) or traps. I know the game has changed slightly over time, but it's apparent im doing something wrong. The tutorials/hints that do come up seem not to work, and there isn't time to fool with it during game play
Try updating your FlashPlayer and Java with the latest patches and see if the game runs normal again. Sometimes the ShockwavePlayer Plugin is crashing and this can be solved by installing the latest patches. =)