Pretty good idea! Animations would add a lot to this game. You might want to consider making this game 2D, because that would allow you to make it look a lot better and add animations very easily without sacrificing any gameplay because its top down. For me, the gameplay didn't feel super tense. Enemies very rarely got close enough to pose a threat, and the modifiers didn't really add a noticeable difference to my playstyle. I think with a little more polish and balancing this could be a really good game, great job!