Glad it helped.
Note that this is endless loop. Maybe you can put condition if CurrentEnergy>0 just after DecreaseEvent (before timeline).
And also on Update exit from timeline connect Is Checked? condition:
True: Current energy - (New Track 0 * 2) => Set current energy. This means that it will reduce energy twice as much when Left click is pressed.
False::Current energy - New Track 0 => Set Current energy
In this way the reduction of energy will not be dependent on frame per second.