Well, cool game, only have 3 issues with it. 1)When I fail, I don't want to go to the shop before I can retry. If I have money, and there's an upgrade I haven't gotten its because I don't want to get it yet. 2) Don't care much for the fact that my missiles miss my intended target because they suddenly changed trajectory to try to attack enemy missiles (specially when my target is shooting the missiles). 3) The last mission, I have found it extremely difficult to do the "kill 50+ enemy's before time runs out" thing. Either increase the spawn rate of the enemies, reduce the number of enemies i need to kill, or increase the time (after about 45 min of trying to get that achievement, my highest kill count is 42...). Other than that, everything is pretty cool.