erm... where's the game?

I have a critical issue after 15 seconds: the game always freeze and I have to restart it. :(

The concept is interesting, even if not unique, but here's a few tips to make it more balanced:
-Make the blocks spawn only in a set of columns to make them pile up perfectly
-Lower the spawn rate at first, but increase it overtime, to let the player get used to the mechanics.

The boxes are deadly right now, i guess you wanted us to jump over the ones that have fallend and climb up to survive ? To ensure a box is not deadly anymore, give each box a "deadly" state that you turn off whenever it hits another box or wall.

A web game with an exe to download first. I don't get it.

Hum??? there is here some problem ++

Cool concept, but dying when you touch the blocks makes for very little gameplay. Try only killing the player when the bottom of the blocks hit them, and allow to jump higher, so I can climb on the blocks. Also: Less blocks please <3

Sartemis Smart has some great suggestions for adding some more gameplay. As just another idea to throw out there, you could drop the boxes on a beat, and increase the tempo over time, make it kind of a rhythm game.

As for a web version. Use this tag if it links to a browser version of a game. Otherwise, name the tag appropriate for the link. For example, yours should be called "Windows" or "Windows Download" :)