Complaints:
1) The gameplay didn't feel all the great if I'm going to be completely honest. First off, the bird's movement speed was really slow (I'm mainly talking about the blue one). So slow, that often times I couldn't get it to my cursor in time to hit an enemy, and especially since it's the only bird that attacks for a while, it didn't feel great to play. Another thing is that when I order the birds to attack, heal, or slash, it was really delayed. Especially in a game like this, where timing is important, delaying attacks just doesn't feel fun at all. If you are going to continue working on this like you said, I would highly recommend making the general gameplay much more responsive and quick.
2) I didn't really understand what I was doing. I knew I was exploring some area that was infested with enemies, and I knew that controls, but that was about it. Especially since this game really feels like there's supposed to be a story behind it, there should be some sort of explanation, or some other way to set the scene a little bit. Even games like Hollow Knight, which basically throw the player in completely blind, have the intro cutscene and Elderbug to provide a little exposition. Granted, it is a jam game, but even one screen with a little bit of text explaining some sort of situation would've made it a little more engaging in my opinion. (I think RockyMullet also touched on this a little bit).
3) The healing ability especially NEEDS a cooldown. It was way to easy to spam heal, and that combined with the gameplay being very slow and frustrating just did not make me want to continue playing.
4) This one seems a little nitpicky compared to the others, but the dirt road thing could've used some detail in my opinion. Especially when it's surrounded by excellent pixel art, it sticks out like a sore thumb a little bit. Again, not a big complaint, but definitely something to do it you want to continue this project.
Compliments:
1) Other than the aforementioned dirt road, the pixel art was really impressive. Especially the birds and enemies, so really good job on that.
2) The music and sound design was also really good. Not much else to say here.
I know I might come off harsh with there being so many complaints compared to compliments, but I really did put a lot more effort into finding things I didn't like, because in my opinion, complaints are a lot more helpful than compliments for improving a game, and especially since I saw that you were planning to continue working on this, I wanted to give feedback on what I thought could be improved. This really is an excellent base to continue working with, since with just a couple tweaks to the gameplay here and there, you've already got yourself a fun and engaging experience. It's just up to you to add what you want. So please don't take this feedback negatively, I don't mean it that way :).