Elgur, I’m assuming that lsl1 stands for Leisure Suit Larry, in which case, you may be better off using ScummVM as it is much better suited to point and click adventure games. You can find instructions on how to set up ScummVM at the RetroPie wiki.
A list of ScummVM compatible games is available at http://scummvm.org/compatibility/.
I’ve not set up ScummVM on version 3 but it is on my to-do list.
I’m going to update my blog regarding the latest script changes for DOSBox. If you do wish to test DOSBox, then a good game to use is Dangerous Dave which is available as freeware from the DOS Games Archive (http://www.dosgamesarchive.com/download/dangerous-dave/).