So for the chaingun, the ammo is more than one bullet per pickup right? (since the handgun won't need it)
That assuming chaingun=machine gun..

I'm in the in-browser thing right now...
It seems more stable in FF6
Hasn't crashed as of yet.
Scratch that, it just smached, freezing up the entire browser for about a full minute before a warning popped up saying unresponsive script :\

It keeps lagging tho..kind of distracting

I've been thinking about this...I would end up needing to have a sort of HUD to show hich weapon and such.  Also the lazar would need a sort of charge bar.  needed for health, ammo?, etc.

I'm thinking of making this sidescrolling, so I'll need to start working on that as well.

As for the explosion, I'm not sure if it'll be possible to fill it with a blank b/c of circle() hot having and or xor capabilities :\

What you might want to try is something like paint.net or gimp (paint.net is somewhat easier to use, so try that)

In the past designer.userbars.com was pretty good, but it was "redesigned", adding in shiny animation stuff whilst taking out about 3/4 of the features :|
EDIT: http://www.userbars.com/design/advanced.php

Well, you could still make a run 'n gun type of thing, doesn't have to be Contra (I'm not doing Contra anyway, Deep Thought's already doing it ), there's plenty out there

I'm not sure if I'm going to try to port something with this, prolly just make it up as I go


And that would work pretty well for a machine gun (or lazar maybe? ) but I'd have to make some pre-calculation process to see where it would hit player, map or side of screen and would cause a noticeable lag (prolly something like what Pixel Fury causes)
Tho if done right, it could work...

hm converter thing works pretty well.
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                                                                 GlassGiant.com

*UPDATE TIME*
I don't feel like making a huge post wall describing stuff, plus it's school lunch so I don't have the time, so see screenies

There are some buggy things, such as how you can hold down multiple fire buttons at once and multiple forces are applied to the bullet (making things like stationary plasma or fast-moving bouncers possible, enjoy it while it lasts b/c I have an idea how to solve it)
(also if you pause in-game the mode menu is displayed fsr, lingering keypress or something idk)

WAT is still exec, source is zipped.
Also, the pad has been updated with the latest source (tho it's full of the weird stuff sourcecoder injects, but it's in there)

controls: arrow keys move, keys around apps shoot, apps scrol through weapons, F1-F5 select weapon, mode pause, clear quit.

EDIT forgot to upload map outside of zip.  Level needs to be in archive.