I think the game needs to be more inviting - I mean even if you don't like playing fruit machines, when there's one twittering away in the corner, flashing lights and silly noises, well it gets your attention. Maybe it needs to be sitting waiting on credits, and have lots of lights and stuff. Lights are the main thing, the machine should be alive with them. Buttons should flash brightly - remember that fruit machines tend to be played in dimly lit areas, so exagerate the brightness of the lights to mimic that. The reels need to be snappy, like move so fast that it's a blur then stop really quickly with just a little kick back. Having tones as well, doop Doop DOOP - going up in pitch with each reel stopping. The buttons definitely needed mouse support, I was stumped when nothing would happen with the mouse click, thought it had crashed actually. One thing I keep in mind, is how would the game be with a touch screen, because I think that's a logical step for Netbooks - so imagine playing with a tablet PC, or with a touch monitor. I'd say the keyboard is the least friendly thing about Netbooks, so make allowances for people with human sized hands

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It's not a bad game at all, it just needs to scream that people should play it, instead of politely asking

. If I was you I'd add in a glow effect for each button, in fact I'd make lots of lighting sprites and hide and show them to make it all flash like a real fruit machine.
Visually, I'd probably have gone chunkier - like have a row of buttons along the bottom at a slight angle, then have the reels take up half the screen, and scroll the screen up to get to the bonus game stuff. Fake LED screens, maybe even an extra dice reel. Fruit machines are a lot to take in, people tend to scan up and down them, so scrolling that wide screen might be better than trying to fit everything in.
If you can brighten it up, make it more snappy and inviting, then you'll be set I think, maybe have a trip to an Arcade and see what inspires you. Remember that adding polish, effects, sounds, it's the fun part of game development, and it's not a great deal of work. Keep at it.
Remember guys, the AppUp store is not going anywhere, if you missed it for now, then keep at it and release your game when it's ready - when it'll make more money hopefully. This is a 'call to arms' to see if DBPro can hit the AppUp store with some new games and scoop some bonuses. AppUp will need new games and apps all the time, and Intel might even introduce more incentives later on.