@theismcomics I think your panelling style reads just fine, but adding a bit of space between each panel might give them a bith of breathing space. It helps lead the eye of the reader across the page, and indicates a passage of time between each panel - otherwise it might look as though it's just one big picture, rather than several individual panels.
... Your comic does have gutters. They're right here - I've circled them in red, with arrows and everything:
Those little gaps between the panel-borders? Those are gutters.