Scroll with Arrows.
Hover your mouse over icons for tooltips.
Ctrl for x10 Buy
Z for x25 Buy
Shift for x100 Buy
Choose which side you want to play as:
Light side = Active Clicking and gameplay (click the monster);
Dark side = Idle gameplay;
or maybe a balance of both.
Progressing through the game unlocks more features, some of which will change your gameplay so be sure to explore everything!
(A) = Additive
(M) = Multiplicative
(T) = Toggleable
1e+3 = 10^3 = 1,000
1e+5 = 10^5 = 100,000