Great, fun, addictive game! Tip for newbs: I usually keep my 1st gun (Pulse Pistol) 100 levels ahead of my last gun (Particle Ball). Also, i keep them at an one upgrade difference. For example, from top to bottom, 325/310/300/285/275. And I upgrade the top first and then one after the other. Although sometimes its easier to save a bit and just upgrade the 1st gun twice before upgrading the rest. additionally, reset at lvl 100 for the first few times until you notice it is easier to get to lvl 105, and slowly climb. The idea is to harvest the timecubes from lvl 105 (ONLY if it's fast to get from 100-105, under ~20 min, otherwise reset at 100).
Also, if you just started, don't get frustrated if its hard the first couple resets. Took me nearly 2 days for the 1st reset, and a day for the next few ones. It does get a lot faster as you do more resets, so keep it up! And if the boss is too hard, just go back a level and go afk for 20-30 min or so.
"double projectile" means that something that shoot at 3 will shoot at 6, while "double dps" will just mean double the damage, right? although they both result at the same damage increase, is that correct?
Could you please make it that if you sell a unit at the same turn it acts as an undo? Because sometimes i accidentally place the wrong unit and I can not "undo" my action.
This game is amazing! but I will come back to play it only when i will be able to navigate with the arrow keys or other keys in the keyboard, mouse navigation is way too slow...