Well while I wish it was finished, I think what you have so far here is a great start. There aren't many flowlab games set on a train, much less a steampunk train, so this has a lot of potential to be engaging and fun in unique ways . . . I like the particle effects, and the sounds are nice too (though the footstep sounds are a bit loud---at first I thought something was going wrong with the water tank when I was walking around). Also the option to sound the train's whistle is great :)
Good job so far, and good luck as you develop this more!