Topic: Spells 2
In D&D 5 you cast cantrips for free. So you can remove the cast button for cantrips i think, leave just the info, what you have.
In spellslots, please use the maximum number of spellslots. So if some1 has 3xlvl 1 spellslot just let him cast 3 lvl 1 spell, and thats it.
If you would like to do it, and make the prev asked thing, you can add an additional button, the spell lvl button. So if some 1 cast a spell, a popup window pops up and ask which spellslot you would like to spend and then substrats it from the maximum.