Liba Vaynberg’s Round Table is a small play with huge aspirations. Focusing on a pair of nerdy lovers who meet through an online dating app, Vaynberg’s work is at heart a sentimental and sweet romantic comedy. Interspersed throughout, however, are scenes inspired by the legend of King Arthur as well as monologues that break the fourth wall to address heady quandaries about unrequited love, self-idealization, and mortality. To the credit of the winning cast and fleet direction, the intimate production at 59E59 Theaters does not collapse under its own ungainliness.