Pretty stupid. The sequel is much better. George Carlin supplies the only interest here.
Leonard Maltin/Plot synopsis:
Inseparable teenage airheads, who are about to flunk their history course, are given the opportunity to go traveling through time to meet (and round up) such historical figures as Napoleon, Joan of Arc, and Abraham Lincoln. Radical! Reeves and Winter are great fun as Bill and Ted, but this goofy comedy never takes off as it should. Followed by an animated TV series, a live-action TV series, and BILL & TED'S BOGUS JOURNEY. Panavision.