Short answer: Yes it is possible if you are good with tools, and understand the precision that is required to modify a precise wooden utensil. (many cues have finely engineered weightings to ensure the best feel and performance) If you possess such skills, you should have no problem modifying your cue. Kudos for being so resourceful.
You are also correct in wondering if it will affect your game. It will. As I mentioned in another post tonight (and I'm sure, many before) the game is mostly mental. If you even "perceive" a weirdness in your cue, your game will be off. (think about muscle memory - it needs conditions to be exact)
Let us know what your end up doing, and as Quick said, good luck!
Ps. welcome to the forums!
So just to be sure about what you are asking: I have a billiard table at home, and I put the pool table in my own room. However, I had to put the pool table in a way that only leaves roughly 80 centimeters between it, and the wall. This minimizes the space available when I play. The problem is that when I shoot, I don't have the space required.
Amazon does sell cues for "kids" (simply meaning they are shorter...) so you might want to check that out.
My question is can I modify my pool cue in such a way that makes it shorter? A shorter pool cue would eliminate my space problems, but I'm obviously concerned that doing so will affect my game.