Good work!
Like you said in the ending- the particles and character movement were really solid. I liked the healing with the cooldown. Pixel art was pretty decent, the background and characters looked nice.
There were two things I'd work on more here. First is the use of special object. While the "street fight" part was well done, the glasses could've been more prominently displayed.
The other was enemy ai, or enemy variety. It was pretty easy to find a spot where drones couldn't reach you, and then spam attack to defend from the guys on the ground. If the drones moved around player would have more incentive to move around more too.
All in all- pretty good!