i found a way to beat this on laptop without using keyboard shortucts FROM GAME.
recently kde (yep, that trick linux-only) guys added option to use num lock as additional option to use mouse virtually (mostly for people without mouse) and some laptops do have numlock, so basically i switch numlock click to middle key (* on numlock row). then hold 5 on numlock and at same time scroll with touchpad. quite works but it also makes number random. sadly. this middle key also works with combo of left+middle and right+middle for these cominations.
enjoy that "cheat" :)