Could be good...but isn't.
Ninja baby using a super laser to kill old nazi robot schoolgirls sounds awful first off. Like a Korean hash of a really bad anime hashed from an old American cartoon gone wrong. The music was okay, but a mute button is always nice. The lack of sound effects was bad, but considering the amount of explosions and death going on, I understand why.
The gameplay itself was good for the amount of time spent on it. But your character just looked like a short ninja with a diaper on, not really a baby, and the enemies didn't look like anything. There were no swastikas to show that they were nazi, and the only proof we had that they were old was the wigs and the schoolgirl bit was when one or two of them had a dress.
Starting off with an amazing laser and improving that weapon of choice was an excellent idea, but the upgrades didn't really do much, and the health buying button was broken. It would have been nice to see the option to buy a squad of babies or a laser wall for your fortress like the enemy had. Adding a story and different maps would have also been a big improvement.
I rate this a 4/10, slightly below average, which is good for this game. Work on this one more guys, and bring us a full game!