I just finished playing the demo and right now I'm making a video for youtube! I loved! Let's say that I am a semi-developer of video games (that's why I dedicate myself to testing other people's games) and before starting the YouTube channel I had an idea similar to that of your game, only that it did not have the function of attacking and shooting but that it only had the function of the shield (basically the same), for reasons of time, and that I had no one to make the sprites for me, I got rid of the project.
But it makes me very happy to see that someone had an idea similar to mine, this will probably become one of my favorite indies, I hope to see it on steam very soon and I will buy it from you as soon as it is available !.
Congratulations and I loved the game!
Sorry for my english, i speak spanish haha