Maybe have an option to have the money/numbers shown in Scientific notation instead of septrillons etc. More contrast between the dark grey "can not afford" and the black "can afford" button shades. so far is enjoyable. hope you make other great games in the future.
If you are stuck at the Loading Page, try refreshing the game. Usually fixes the issue. Nice game but lags down when you have to many factories. and maybe some different creeps per level. But fun. Thanks
622 is a dead-end. You're probably missing a bit of intel from 17 to get 69 to tell you something of interest.