You can either use the session-wide link, persistent links, or single-use links.

Session-wide link

If it is impractical to distribute distinct URLs to each participant, you can give the following start URL to all 30 participants.

https://floating-sierra-61355.herokuapp.com/join/b4obct7cph/

Note: unlike the other link modes, this does not prevent the same person from playing twice.

Persistent links

If you want to give your participants permanent links that don't change, you should create your session in a room.

Single-use links

Below are single-use links, which you can distribute to your participants. Each link has a unique code for the participant.

P1	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/ikqhpvr3
P2	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/mnuwvpxa
P3	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/sk76x2i1
P4	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/d0dpl4yc
P5	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/qres0fwh
P6	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/hsnlfojy
P7	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/rot8ljsm
P8	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/xq4u3rfl
P9	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/vzqv9dgp
P10	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/6yznazxr
P11	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/r2rw85bp
P12	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/f25wjkhk
P13	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/fgvf845u
P14	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/qk15osln
P15	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/q0bxnf0s
P16	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/3eumy2mf
P17	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/ra4s2y8j
P18	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/xpq03xzm
P19	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/tnxd1keg
P20	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/tgz1q9j6
P21	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/crs7lo1s
P22	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/mbw1u149
P23	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/odcziama
P24	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/ewlyvv76
P25	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/eh91nbiz
P26	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/jiwphb44
P27	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/06vqin5n
P28	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/1poju7wa
P29	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/mv1x0uzj
P30	https://floating-sierra-61355.herokuapp.com/InitializeParticipant/m48dhldg