Thanks for this really complete feedback! We really appreciate it :) I think you've pointed most of the issues from this prototype and came with a really good vision on the project and what it could become. The idea of beating a boss giving you a new start position is simple and would be really effective.
We wanted to go for a kindof "age of war" game but we lost it in the process for some reasons. Teleporte could definetly be a spell you can use to get all your minions into the action.
I agree for the warriors getting forward and backward to collect the loots. I've tried a collect at contact but it wasn't so fun neither. It may be interesting to do it by clicking on the item and giving more weight to the clicker gameplay.
We've had the idea to have powers such as zone healing and so on but we ran out of time :)
I'll have a look on the optimization as well, there are a lot of things running in background so... no surprises sadly.
Thanks again for the post!