Annoying........
There are only three things that I can say about this game.
#1: This is perfect material to submit if you want almost the entire population of NG to have a blood feud against you, as the laggy gunshots and walls that are practically like trampolines absolutely tick the god-damn mickey out of you, not to mention going "Back".
#2: WHY THE HELL did anyone even bother with this? It's not the bloody 1980s, and nowadays a three year old could program a script like that, and probably make it better, too.
#3: Almost no-one has the patience to play puzzle/fluky-skill games for very long before getting bored, so making someone play to the end of your repetitive 4-bit fantasies whilst being thwarted by impossibly annoying physics, flying graves and generally lowering people's self esteem and raising their intolerability is about a one-in-five chance.
And seriously, don't try something like this again, people who play it will only take out their anger on others, most of the time you being the target.