Eh.
Decently put together game, but nowhere near a "world's hardest" game. It was reasonably in difficulty, but not that hard to get to the end.
I would note though, that a large number of flashing object moving very quickly around a screen can be a problem for the epilectic.

Just a few issues:
What's the point of having both 'play' and 'new game buttons? I finished the game, clicked play expecting to see something like a level selection but got nothing. Another issue that kinda kills the point of the whole game is that it's not really that hard. I didn't even have an average ratio of three deaths per level, but less. There are way too many safe spots and the thing would be harder if both the square and the circles were proportionally faster. The game didn't have any music (unless I missed something), but that didn't bother me, as these kind of games usually have a crappy music that I turn off anyway. And circle sprites with square hitboxes aren't nice.
However, the controls feel nice, the graphics look ok and there is Moses, so I won't be that harsh with my scoring. Overall, it's an 'ok' clone/reincarnation of the old thing