A couple of things to improve upon
First of all, the special units need to cost less since even with the two upgrades you can get under the skills tab, you can buy at least 12 regular units, making the special units basically useless. Second of all, this is a limited version and should be made clear in the beginning of the game, and if a person wanted to play at kongregate for the full version, there should be an option to transfer the game over for less hassle. Finally, actually making the special units avaiable to purchase is too much of a hassle. PROTIP: if you want to transfer your game from newgrounds to kongregate, go to kongregate, start a new file, save, go to search, go to advanced options, click on include non-indexed, hidden, and system files, type in *.sol. There should be many files; only right click and open file location for pRotectoR-kONgRegate and protector_ng_1_0 or something similar, delete everything in the kongregate file and copy and paste everything in the newgrounds file to the kongregate file. Follow these directions exactly or you may corrupt all of the data.