Take my opinion with a grain of salt, it just might not be my type of game.
I found that the game difficulty was extremly difficult and the AI was kind of insane.
For instance, most of the times the robots and ninjas would make their first shot above my head, because they usually come from a higher platform.
If they did shot me on the same level, then it would be pretty difficult to evade, because everything is so fast and it is cluttered with enemies jumping around everywhere.
However, even in the current state, I found the game to be extremly fun. Though I am not sure I would have played it again, because I am dieing every other moment.
If you could somehow balance the difficulty to be less random, and still make the game so hectic with jumping ninjas and robots, it could be a lot of fun.
Graphics that seem out of place, that turret seemed out of place, because it's pixels were bigger for some kind of a reason. Also, I had no idea how to destroy it, or should I just passed it?
Anyway, it got potential. Good job.
Edit: I think one thing that confused me is that ninjas don't kill me when they touch me. And it's not clear which enemy kill you by touching you and which do not.
Alright, I can make the ai a bit less hectic. Do you think I should accomplish this by making them attack less often, or move slower?
The robots and ninjas kill you by projectiles, the jumper enemy kills you by touching you.
Also, you can do a roll to evade attacks (down and sideways). This is extremely useful.
The turret can be killed but it takes a lot of bullets.
Also, I need to know - Did you kill all the enemies as you passed them? Or did you let some enemies live as you ran through the level? The game does not spawn enemies, rather they are all placed throughout the level by me. So if you run through the level without kiling the enemies, then all the enemies will stack up and you will have a huge hoard to face. On the other hand, if you kill all the enemies as you see them, it should be much more managable.
edit - should 2 player games have this level of difficulty? Or should that be toned down as well?