Fairly usable as-is, altho there's plenty of small issues that could be improved here and there, including more blending / anti-aliasing of the ski-lift chair.
There's very few good pics of this game to compare by, but one thing I'm kind of baffled / bemused by is the darker blue upper sky. If you zoom in a bit, where did all those swirls and textures come from? They're not artifacts, so did Chicago Coin actually design it that way? (seems equally unlikely)