I know this is considered cheating, but I don't care. What I'm looking for is some way to hold down my left-click and make it click continuously.

Justification: I need this for the game Insaniquarium. I don't know how many of you have played it, but you can seriously get carpal tunnel from this game. There's a decent amount of strategy in every level, but towards the later levels there is nothing but clicking like you're on speed.

I have played this game all the way through three times and unlocked everything, and I'm still playing it. But in order to preserve my forearm for work, I'd like to cheat now! So any help you can provide me would be most welcome.

ps-and don't worry about me cheating in some online game. I don't play any and never plan to.