To reduce speed change performance (in game profile) to custom. Start game and tune cycles/power from general settings.
Other way is manual setup “expert settings”. You must be familiar with manual dosbox config. Here you can set
cycles=3000 or cycles=auto
Just play with values
If game runs slow it may be because you set wrong cycles, wrong sound card, but probably you need set correct cycles value
Just tried pickle wars. After I set sound blaster with 220/5/1 it works fine. I am in level 1 screen