If you came here to play the game, you are on the wrong page. This is the correct link:
Naruto vs. Sasuke

These are the following objects(minus waveattacks because it seems like its pretty obvious):

The Wall:

Not only is it a wall, but it handles the most important of the games functions.

The Health Pick-up:

Gives you +25 health on pick-up, sometimes even more.

The Damage Pick-up:

Gives you +5, +10, +30 damage on Waveattacks, Special Waveattacks, and the Rasen-Shuriken attack on pick-up.

This effect stacks.