I really like the sleek style you're going for, it's working out very well. I especially like the character layout in panel 2 and the landscape in panel 3 - that one's great. And I like the smaller details, like the shading on Sonic in panel 5.
(That's a skill I really really envy you for, to be honest. I have enough trouble keeping my own chars on design, other peoples character? Nigh impossible, Consistency in char design, I fail at it.
One thing is niggling me - To me it feels as if you have too much white in your speechbubbles and/or the weight of the white is unevenly distributed. Basically, you have too much white for too little text. That's been on almost every page so far, and I can see two reason for this:
1) The tails of your speech bubbles are a bit too long and/or to wide to me. You do not need to connect the bubbles to the characters head, as long as the "tail" just points clearly into the character's head direction. Look at how short they are in the comic you've linked in this topic.
I like to make them even shorter than on your example page unless needed for special effects (maybe sometimes even too short), but that's a matter of style. But those short tails are much faster to make than the long swooshy ones.
2) Your text-lines are too long for oval bubbles. The longer lines on that comic page you linked work because the letterer squashed the ovals into something more rectangular. There are two solutions for that: Either you start squishing your ovals into something more rectangular, or you break them up more so that the text itself takes up a more oval space.
A bit experimenting will help you there - this is really just a matter of lettering style. Maybe lowering the lineheight of the font would help too, I don't know.
As you see, it's not even remotly an art issue - it's great! - just one of those details that are necessary to give any comic a professional/polished look. But I hope my comments helps a bit. Good lettering is hard, and it took myself ages till I found something acceptable for my comics. And I'm still struggling with it sometimes.
Anyway, I'm really looking forward to the next page.

















