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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Gordon
I guess you need the lights, an Espruino Pico, a speaker and amplifier (you could probably just buy something meant for amplifying stuff from a headphone jack), some power source (a USB battery pack), and to detect you hitting something I'd actually just use a vibration sensor (http://www.espruino.com/Vibration). They're cheap and easier to interface than a proper accelerometer.
I'd probably get a decent size 6.3v capacitor to put across the power rails too - the LED strips tend to draw quite a lot of power and the capacitor really helps.
For the LED strip, what about the WS2812B/Neopixel strips? Some of them have the LEDs almost right next to each other: https://www.adafruit.com/product/1507
But if you did want to go for single-colour LED strips, you'd just need to buy some FETs - there's some info on FETs here and there's actually a brief tutorial on how you might go about wiring them up, including which FETs to buy.