OpenEuphoria

Can you add a single step debugger, with reverse/forward execution, and ideally a nice GUI interface, to that?

PS: It is totally acceptable to emulate reverse stepping via restart and stopping earlier (and in fact I'd prefer to see that over a mini-history).
[I don't personally give much of a hoot about whether that is achieved that via system(cmd) or an in-process re_init(), btw, both have different merits]

PPS: If you don't throw the gauntlet down, how'd you expect anyone to pick it up? And that absolutely has to be the perfect opportunity to get the basics going.