Just wanted to let you know, that the bonus from unique wonders and building stands work multiplicatively in respect to each other, but additively with themself - on production buildings (the efficiency number) displays them as applying additively only. Example: 2 wonders (5% each -> +10% efficiency) and one building stand (10%). On the effected building (base production 400) it is displayed as 120% efficiency, but in fact the building is producing 484 instead of 480, so 121% efficiency.
Well, I've been playing this game for a about half an hour and I have to admit, that I'am not progressing at all. +2 starting gold per level seems ridiculous, it even took me a couple of tries to beat the very first level. Otherwise a stable tower defense game.
To sum, the leveling and the difficulty systems could need some improvement, so I'd say 2,5/5 with potential to 4/5.
First I thought, ''20 points? That's neither a hard nor a medium badge... Sounds intressting!''
Then I realised that not even 30 points would be an appropriate reward for this waste of time...