One of his strategies (from the README on Github) is "favoring static compilation rather than a runtime interpreter", so I suspect that `eval` is not included in Mug.

However, `apply` is included (cf. test/regression.js line 19). So your example pseudocode could probably be written like this:

    for (var i = 1;  i <= 10;  i++) {
        var f = function() {
            print("I'm " + i.toString());
        };
        f();
    }