Only two things which would be great : Ability to create and share Levels online and A endless level with increasing difficulty with a highscore so you could see how well your freinds do(would be great for a challenge)
Here is a list of what to do with skill points : Buy nearly everything for Undead first because then you can spam meteors at the enemys (Ninjas mostly :P), then do Orcs because they have good things which can upgrade all of your towers like High ground increased damage and range, make sure you have them upgraded then upgrade Demons (the only good thing about them is the meteors) Hope this helped !
@ epicshowdown wow rly man you spend all your time typing comments on a fake game which you find is a good thing to put in the comment box it makes me sad
Really is there any need to post stuff like "Kinda hard, but with 2 Fireblasters it is possible to beat the last lvl" because that can cause people to not know how to play it that is all