Cute little game, I love the concept, but the gameplay felt a bit rough at times. You couldn't place the shields above or below you, and you could only have three shields out at a time. A lot of obstacles (particularly spikes) could be navigated without even using the shield, and on the first level I didn't use the shield at all. Since I had so much health, and the enemy died in one hit, I ended up just tanking alot of hits to get to the end, which does work with the funny concept of saving the enemies, but didn't make for particularly interesting gameplay. Perhaps the player could have less health to force you to play around with the shields some more?
I still quite like the game, particularly because of its smart role reversal and nice pixel art. After completing it all, I actually went back and tried completing the levels without taking damage, the first two levels were achievable, but the last one had a small goal area, and you had to take a hit as the enemy passed the finish. This was much more fun to complete, it was a greater challenge (but still achievable) and I needed to move fast to get it done right! It also did a better job selling the theme of the game, my life was on the line, and when I finally got that ungrateful enemy to the end, I could rest satisfied. So overall I had fun with the game, I just think the design could have been a bit more fleshed out.