Espruino Lightsaber

Well, the Espruino Pico can play back short low-fi sounds pretty easily - so you may not need the MP3 player module at all.

To get the swoosh, you could consider using different sensitivity vibration switches - a sensitive one goes swoosh, and one that responds to harder knocks creates other noises. You could use an accelerometer for sure, but it depends how confident you are writing code. If you are that's great though - an accelerometer will give you more ability to fine tune things, it'll just be a little harder to get started :)