+ Rather addictive
+ Interesting idea
+ Lots of different minions to collect
- Really needs sounds and music
- The UI needs some work. It's hard to understand what is going on (to start with), I didn't realise that they needed to fight all the way back again which meant that I had to wait for a looooong time to spend my money. Plus it's difficult to tell which way they are going.
- I think that the inventory needs to be larger, after just a single upgrade to the toughness it almost immediately got filled with every minion in the world, all of different levels
- The auto-merge is a cool idea but needs to be more intelligent. My inventory was full for ages until I realised that it only auto-merges the last minion and only if there is one available to merge with. I think that it should be constantly scanning the full inventory (and the sub bench) for matches.