I've played a ton of tactics games and yours is feeling great so far! It's natural and engaging--and a bit harder than I expected it to be, which is not a bad thing!!
Controls are good and crisp. Do you plan on adding controller support?
The only thing I'd keep an eye on his balance between music and sound. The music levels are good, but I think the selection sounds are a bit high (too much treble?)
Overall great work and looking forward to seeing how it develops!