Reading through what you've got I've determined a few things about it:
Strengths:
Your story telling is paced fairly well - no panels that don't belong, and everything is indicated with decent enough precision. Your dialogue is charming sometimes, and generally keeps readers interested. I enjoy the character dynamic - they're funny together and enjoyable to read.
The character designs are endearing and unique - a species with a mouth on its torso is pretty inventive, as is an ant person.
Your linework is strong and your environments look confident. You tend to keep the setting in mind and indicate it in many of the panels which really benefits the atmosphere to a certain extent.
Good job expressing their faces, too - non-conventional faces are difficult to emote but you manage to make it work decently. I can tell what characters are feeling, and they read naturally.
Your paneling works well - you use the size and shape of your windows quite effectively.
Improvements:
As previously mentioned, some depth/contrast might need improvement.. As your comic is not in colour this won't be as easy but perhaps a bit more indication into the setting's lighting would help. If our characters are supposedly in a tomb lit only by torches, perhaps there should be a lot of shadowy corners and the lighting shouldn't be so even. Lighting really effects the mood.
Your word bubble placement is a bit all over the place. I'd recommend trying to make them flow downward over the page. Mark Crilley explains it very well on his channel, if you need more explanation. The idea is to make the reader's eyes flow from bubble to bubble naturally - left to right and top to bottom. this means your word bubbles should begin high and leftward, and flow downward and towards the right. Sometimes your bubbles are in a weird order, and I can't tell which comes first. This is only an issue on a few pages but it does bother me.
Hope it helps you :^O I like what you've got so far.