N_I_C_H_O_L_A_S

Hi! If you're still interested, here's what helped me. Seems like either after just doing D'Qar level with Rey for the 1st time, or after finishing all 4 levels or getting all blue bricks first and then doing D'Qar level with Rey I got a hint-block to press 'space' and deflect blaster bolt (that green-tip cannons shoot). So this way at Starkiller level you can destroy a cannon near that trap with Ren figure (but only with Rey). Then push the crate standing behind that same cannon (which you destroy) down to toggle a button and voila! May the Force be with you!