Enigmata

Slayer – Kill 300 enemies, Massacre – Kill 1000 enemies, Bonus Addict – Collect 100 Bonuses, Collector – Bought 5 ships, Loaded – Earned 100,000 gold, Firepower – Owned all 3 types of missiles, Bankrupt – Lost 50,000 gold Game, Master – Defeated 3 bosses, Pwned – Triple kill, Starter – Killed 50 enemies, Risk Taker – almost dying 3 times in 1 round, Elite – Killed 10 bosses, Millionaire – Collect 1,000,000 gold, Master Collector – Buy all shipsMasked Destruction – Used 1,000 missiles, Insanity – Crash into a boss, Kamakazi – Killed an enemy by crashing into it, Ultimate – 5 Million Gold 5000 Enemies, Victorious – beating the last boss KEEP COMMENT ALIVE! sorry people i hate chain messaging, but i found this extremely helpful

when you destroy the grey block thing (like the ones you normally destroy but without the orange dot and it takes alot to destroy) theres a chance to get a "V" coin (3,000,000)
it works with me most of the time, hope it works with you too :)

Things that combine: Ultra fire + Missle Blast powerup = Ultra missle blast, Megaton laser + Double fire = Double laser, Ion Wave + Tetra fire = Triple wave, keep this comment alive for people to know!

Easy way to win: Buy darkness energy charge and time stop. Then just time stop and shoot until your energy runs out and then charge twice, and repeat. I have personally tested this and it works on all bosses. Also, to those who might be unaware, autofire can be toggled with the "z" key.

tip-after you have the 'bosskiller' generator, finish a level and leave the end summary screen up. The thing will generate for you, without firing. a very easy way to get alot of boss killers.