Unfortunately the player base can't be blamed for assuming the game has been abandoned when there hasn't been word from the dev in almost a month. This isn't a in game suggestion but a community relations suggestion, it might be a good idea to post a little update weekly in the update section, doesn't even need to be commentated like the devlog, just something that details what's coming. I know there are people who found this game enjoyable but need a reason to check back every now and then, which they haven't been given recently.
This game has a lot of potential as others have said. However, as it stands currently after playing for 30 mins or so there isn't anything more to do. Maybe try and give a reason for people to keep coming back to the game whilst you're working on bigger updates, maybe a rank system, a way to spend your souls, more upgrades and more than 15 stages, etc.
Would it be possible to implement a feature allowing people to turn off animations? Even on the low setting the game lags a lot and takes a lot of the enjoyment out of an otherwise fantastic game.
I don't see why lots of so many constructive posts have been downvoted. I think this game is really quite enjoyable, my only hope is that they add a speed up for single player battles sometime in the future.
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Good suggestion, I'll see what I can do.