Fun little platformer with nice graphics. I managed to beat the level with some attempts and thought I had collected all of the "kikkares" but apparently had still missed some. My score was not very high at the end, probably because I died too many times. I think I even was at a negative score at some point...
One thing I would suggest consider if continuing working with the game, is the difficulty of the enemies. They shoot quite fast and they have really wide range in shooting angle and shooting length so losing hearts feels almost certain when trying to move past them. Also, it does not help that the projectiles are so small that they barely can be seen. I understood from the description that you intended the game to be difficult, but even knowing that I would think about tweaking the enemies. But it might be that this was also the kind of difficulty level that you were after.