awesome!
the game rocks, i loved everything about it. but there were some things that made it unbalenced:
1)enemies cause way too much collision damage, they go from killing you in about 5-6 collisions, to over 1,000,000 damage with one collision. waaaaaaaaaay too much.
2) also, im not sure if this is just me or not, but my shield started out all the way at 200000 (Max hp) at lvl 1, until the later lvls i was completely indestructable. work on it if possible, add a way to raise your shields max hp and lower its starting max to like 500 or something.
3)lower the damage your shield takes. at first it was nice, and steady, but around missions 9 and 10 your shield starts going down in a few simple bullet hits. add a way to strengthen your shields defense (and add a limit, we dont want super tankers who never die lol).
4)weaken the shield, alot. the shield does NOT lower the damage by 3/4. it sends ALL damage i take to 1, guarunteed, no fail whatsoever. please work on that. (this refers to its power, not its defense. these are 2 different things people).
5)balance out the exp needed between lvl ups/the experience enemies give (i have alot on this, bear with me people). the first enemies are decent, 1 exp givin and about 26 exp needed is nice. quick, but not too quick. but the first spawners gave me 1 entire lvl up per spawner killed until about lvl 6-7. please work on that, its too much exp from them. also, after i reached the high 10s, it went from needing a few thousand exp/lvl up, to needing several HUNDRED THOUSAND exp/lvl up. this was one of many wtf moments, and the enemies worth even 10% of the bar were extremely hard, lower their difficulty a little. and then at lvl 46, it went from needing about 2 million experience, to needing almost 100 million experience, my next wtf moment. please lower the amount of exp needed between lvl ups and balence it out, keep the amount rising at a steady pace, not massive jumps please. it makes the task daunting and difficult. also, raise the exp rate of some enemies, such as the purple moving turrets (mission 12 enemies) they are extremely hard in the low 50's, but only give 2 million exp, while the green moving people (mission 11+) are quite easy and worth 25 million exp, the blue people are worth 35 million, and the red ones are worth 65 MILLION!!! please moderate how much they are worth, as once you hit lvl 50 the people enemies are the only REAL way to lvl up.
6) fix the pause feature. ok, scenario, lets say i pause in the middle of a fight, go to another tab, then go back to my game. its NOT paused, wtf? im dead. but then, i click the game, and BOOM, it pauses! please fix this glitch, it angered me very much half a million times (especially if ive almost beaten a hard mission).
7) lower the boss of lvl 10s difficulty. his side turrets were good, no problem with them, the shield was a nice addition, made the battle challenging but still do-able. the boss' laser stops it from being good. at first the single shot is good, no problem. it doesnt get too hard until the double shot laser. its almost impossible to dodge, does too much damage, and if you do dodge it (a.k.a. hide inbetween the lasers), your left at the mercy of high damage turrets. the only reason i even beat him was i went super form (f key), went to a side of him (the sides arent protected by the shield), and beat it to death with the big laser while all of its attacks were doing 1 damage (btw, the weapons all rock. good stats and differences between upgrades. loved it).
thats all i can think of, other then that awesome game. 8/10, 4/5.