This is a good game except that it sometimes generates no-win scenarios (such as NO extra power income or NO adequate offensive spells).
Also, there's a problem where summoned creatures in the north water cannot move south, and summoned creatures in the west water cannot move at all.
Finally, it would be useful to have a command to banish your current summoned creature. It's possible to get into a situation where you can't cast anything because your summoned creature is eating exactly your mana income.