This is a video guide for every playable (interactive) object that can be added to a custom level. The list of playable objects appearing in this video are listed below.

1. Track
[0:05] .leaf - pitch
[0:08] .leaf - roll
[0:11] .leaf - turn
[0:14] .leaf - turn_auto
[0:17] .leaf - scale_x
[0:20] .leaf - scale_z
[0:23] .leaf - visibla01, visibla02, visible, visiblz01, visiblz02
[0:29] avatar.lib - sequin_speed
2. Thumps
[0:39] thump.spn - thump_rails.ent
[0:42] thump.spn - thump_rails_fast_activat.ent
[0:45] thump.spn - thump_checkpoint.ent
[0:48] thump.spn - thump_boss_bonus.ent
[0:52] thump.spn - thump_rails.a01, thump_rails.a02, thump_rails.ent, thump_rails.z01, thump_rails.z02
3. Grindables (Red Bars)
[1:02] grindable.spn - grindable_still.ent
[1:04] grindable.spn - left_multi.ent
[1:05] grindable.spn - center_multi.ent
[1:07] grindable.spn - right_multi.ent
[1:08] grindable_multi.spn - grindable_double.ent
[1:10] grindable_multi.spn - grindable_thirds.ent
[1:11] grindable_multi.spn - grindable_quarters.ent
[1:13] grindable_multi.spn - grindable_with_thump.ent, grindable_double.ent
[1:16] grindable.spn - left_multi.a01, center_multi.a02, center_multi.ent, center_multi.z01, right_multi.z02
4. Duckers (Blue Rings) and Jumps
[1:25] ducker.spn - ducker_crak.ent
[1:26] jump.spn - jumper_1_step.ent
[1:28] jump.spn - jumper_boss.ent
[1:29] jump.spn - jumper_6_step.ent
[1:31] jump_high.spn - jump_high_2.ent
[1:32] jump_high.spn - jump_high_4.ent
[1:34] jump_high.spn - jump_high_6.ent
[1:35] jump_high.spn - jump_high.ent
[1:38] jump_high.spn - jump_boss.ent
5. Millipedes
[1:44] millipede_half.spn - swerve_off.a01, swerve_off.a02, swerve_off.z01, swerve_off.z02
[1:47] millipede_half.spn - millipede_half.a01, millipede_half.ent, millipede_half.z01, millipede_half.z02
[1:50] millipede_half.spn - millipede_half_phrase.a01, millipede_half_phrase.a02, millipede_half_phrase.z01, millipede_half_phrase.z02
[1:53] millipede_quarter.spn - millipede_quarter.a01, millipede_quarter.a02, millipede_quarter.ent, millipede_quarter.z02
[1:56] millipede_quarter.spn - millipede_quarter_phrase.a01, millipede_quarter_phrase.a02, millipede_quarter_phrase.z01, millipede_quarter_phrase.z02
6. Sentries
[2:05] sentry.spn - level_5.ent
[2:13] sentry.spn - level_8_multi.ent

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Thumper File and Object Format Specification (WIP): https://rainbowunicorn7297.github.io