Thanks all for all the comments
Love it!
But inspired by that lightning flash: have you considered replacing the background with speed lines while the multi-throw freeze is in effect? So that you'd only see the ninja and the enemies, plus the stereotypical black lines + one colour flying by horizontally in the background?
It would look very cool, my only worry would be that the player wouldn't be able to see the platforms when throwing, which could be an issue when judging the trajectory of arcing and bouncing projectiles. Something in between might work though - I've added a task to experiment with this later. Thanks for the suggestion!
Moving high-contrast rasters usually creates blurry/flashing visual artifacts, but your graphics look very nice in motion. Have you taken any special care to avoid these problems?
No but I use Construct 3 which could be using some tricks to prevent these artifacts though.