First of all, the jumping sound has been copied from super mario bros. The graphics are paint-made, like the "two" of "Jumper 2" or the boxes. The gameplay is poor and boring, the enemies can hit you without even touching you, they have a huge hitbox, and jumping feels like being on ice: unconfortable. With the walljump you're just being shotted up in the air, out of the screen, and you have to guess where are you landing.
I also found a glitch: in 2-8, when I die and instantly run to an enemy, the screen gets stuck and I cannot respawn. So I have to refresh and do everything again.
In conclusion this game shouldn't be in newgrounds.