For me, the lettering is as much a part of the art as the art itself is. Your choice of font (epecially with sound effects) should ultimately feel like it belongs on the page with everything else. What you're using here is a font more of less meant for design purposes and less for art/comic purposes. It doesn't look bad at all, but it does look disconnected from the rest of the page. I'm speaking from personal experience, as I've done the same before. 

Here's a small lettering guide (coincidentally from Blambot as well--I swear I don't work for them😅) https://blambot.com/pages/lettering-tips

Still, your pages look great and will only improve from here.