After seeing some screenshots from your game and looking at the games you're basing it around, I'm sure you'll be able to make the game that you want. The HUD in the screenshots on the site looks better than the mockup in my opinion <img src="smileys/smiley2.gif" border="0" align="middle" />
You'll need to play around with Construct a bit to get some experience and to know what it's capable of. You might also want to start your game fresh instead of modifying Beard's Super Platformer example. It'll help to know exactly what's going on.
Good luck and I hope to see a demo soon <img src="smileys/smiley20.gif" border="0" align="middle" />