Nice game, but a little vague in the features and their functions. Telling the player that they must accommodate you by making them go to a forum to find out how the game works, instead of providing that information in-game, is rather lazy and inconsiderate from a developer's standpoint. Even lazier is the instruction you have left for the player... "mouse". Consider your customer, not your ego, and you will go far.
There is no incentive to invest in lower levels when their percentage contribution to the whole is 0%. You could look at this for improvement. Good on you for transforming time and energy into tangible reality.
Nice game... only 1 magic unit? You can't really kill the ethereal units with the pyromancer... I had 3 upgraded and couldn't dent the ethereal boss on level 50.
Fixed. Thank you!