Hi gang,
Having played the game for a few hours, I thought I would my thoughts.
For starters, the game is a lot of fun. It plays really well, and there is very little unexpected behavior; my minions act as I expect them to act, the buttons do what they say, etc.
My few suggestions are: 1) Consider having an "enemies" list at the top right, similar to the "allies" list in the top left. It would make tracking buffs and debuffs easier. 2) Consider allowing the summoner to "negotiate" an ability copy from a demon the user has already recruited. For example, I was piling buffs on a Blessed Faerie I recruited, and found another Blessed Faerie in the tower that had buffs I wanted. However, I couldn't copy those buffs over because I already had a Faerie. I would have had to copy skills from Faerie A to a second demon, delete Faerie A, then recruit Faerie B, and copy the skills from second demon back to Faerie B.
This one is a bit of a UI bug: Shocking Stab and Shocking Spear have different wording for "inflict Shock", despite being the same thing. The meaning was the same, it just caught my eye. Maybe color coding some of those de/buffs in descriptions would make parsing the text quicker.
Again, great game! I wish I could play all day.