I just released version 0.2.0 of Timecop this evening (morning).
The primary feature added was the distinction between “freezing” and “rebasing” time. In 0.1.0, Timecop.travel would actually freeze time. This is no longer the case. Rather, a time offset will be calculated, and a running clock is simulated by always offsetting the time returned by Time.now (and friends) by the original offset.
(Note that time can still be frozen with Timecop.freeze.)