This needs to be fixed to be more of a true idle game... It pretty much needs clicks, but they are also next to useless. As an experiment i used a mouse clicker, double clicking every 0.001 seconds. But even this, along with full auto click speed and gem mine, and plenty of other upgrades, hardly does anything. After 4 hours im not even level 100, even with the incredible number of clicks, and buying clicks with gems, it would take an extremely long time to complete. Without the auto clicker to get to level 500 must take over a year.
A cool thing you could add in that would help with the brutally long end game, would be achievements that don't get reset. These could be things like reset the game x number of times, spend x number of angel investors, reach 100, 200, 300, etc. of everything. These could give a speed boost, profit multiplier, or even an angel investor multiplier (so we earn them faster). Just a suggestion, otherwise great game!