It is an amusing you game you have made, it has a high "just one more time"-factor.
The UI should be more noticeable though; at first I didn't know there was a health-system and thought your game just had crappy hit-detection (which I now know it doesn't).
The changing background-color is also nice, but every once in a while you get a bad color which detracts a little from the experience.
All in all a fun entry, but maybe you could have done something a bit more special with the theme?

Nice game. But ninja is moving like soap. I think you should increase friction ;-)

Fun game but you gotta work on the physics ;)

Fun, but it's a pity you can't kill other ninjas.

Fun, but yeah, ninja needs more friction as someone said above)

Fun and fast-paced game with cubeninjas. Controls are a bit twitchy, but I assume that's by design. I agree with Yarr in that the HUD could be a bit more prominent, took me a while to figure out why I only die sometimes. In addition some audio-visual feedback would be helpful to see when you were hit.

Fun game, but The physics were a bit annoying. I think if you add some more features to the game, it might become quite a good one.

Good stuff, I don't have to say much. It's simply fun to play "again and again and again", nice!
Keep up the good work!

Kardfogú of Creative Sectors, out.

I like the random stuff falling from the sky and the different types of ninja - it gets pretty crazy (fun crazy), but the controls are a bit too slippery and it's not clear what's going to kill you.

Cute graphics, agree with the others that the controls feel a touch too 'slippy' though. More visual feedback that you've taken damage would be a plus too. :)

The physics could get polished, but it's a fun little game. Good job and thank you for trying ours :D

I couldn't run the web version because my browser spat a bunch of java errors, so I had to download. The game had a fun premise, but the controls felt really slippery, the UI was understated, and there was very little feedback when I was hit. It's a good idea though, and I'd like to see it developed further.

nice and great work

I like the little ninja faces! It was pretty amusing to watch the ninjas flail about. As far as the gameplay goes, it's pretty simplistic - something to shake it up would be a welcome touch. Maybe an attack move as well. Also some music and sound effects would go a long way toward improving the experience.

There needs to be an indication of when you get hit. Furthermore, the controls are too slippery to do much with, so it's difficult to get any of the crates.
However, the concept is solid, and I can see a great game here. It just needs some fine-tuning.
It also might work well on a mobile device, if you could come up with good controls.

The controls were too wobbly, too little friction as others have said. But that is how ninjas feel, I guess :) Also it was harder to jump with Space than it would be with the up key. Otherwise, really nice game :)

Ninja is quite slippery! I think the controls match with his ninja-ness though. Well done!