The only thing missing here is the endboss regenerating while he's in his shield. No seriously, fix this boss. Full upgrades, full runes but when he hits 10% it's game over..
Needs to be a faster way to earn gold, first 14 missions go fairly fast but for last boss all upgrades are needed. 450.000 gold to go... + 35000 every try for the runes..
I don't get it, when i throw my plane into space it doesn't float down so i can get the achievement, but my plane goes crashing down really fast, even after levelling it horizontally.