I enjoyed this, but I feel like the abilities are currently letting it down:
* The improved thrust using 2 energy meant that I was perpetually out of energy after getting it, and that was dealing me more damage than the enemies. Either it needs to be even more powerful, stick to one energy cost, or you need to be able to choose which to use - I think that last option is best, as it leads to more decision making.
* Even when there are 2 enemies, swing is still too weak to use, especially as killing one enemy and then the other is better to avoid taking damage.
* Slam seemed to be weaker than thrust, and I didn't want to keep trying it over and over to see if there was a better time to use it.