[ ] Consider removing text in tutorials where the following features explain it better
[ ] Add icon when neuron has no input connections to make the user "want" to connect something to the neuron
[ ] Add icon to outputs to show they are not connected
[ ] Add similar icon for voltmeters
[ ] Make item description available when hovering or selecting items
[ ] First tutorial: Firing neuron needs to be connected to the rest of the circuit.
[ ] Popup-boxes when good things are done.
[ ] Find example of neuronal output that looks good as a success indicator. (simple firing rate meter, simple voltmeter, dopaminergic cells, muscle, fluorescent cell, etc.)
Possibly later, for gamification: