Hey! Sorry to hear that you ran into problem.
You can just copy and paste the last 10-20 lines of the debug.log. (open it up with notepad or a similar program)
Also let me know which control scheme you were using (keyboard, keyboard+mouse, mouse, gamepad)
Thanks! 
Yes, debug.log is too big to paste on here. It's 99191 lines.
And same messages are repeated in the last 10-20 lines.
The below are the messages.
ACH_REACHED_OPEN_WATERS was already achieved
ACH_COMBO_EATER was already achieved
ACH_REACHED_OPEN_WATERS was already achieved
ACH_COMBO_EATER was already achieved
ACH_REACHED_OPEN_WATERS was already achieved
ACH_COMBO_EATER was already achieved
ACH_REACHED_OPEN_WATERS was already achieved
ACH_COMBO_EATER was already achieved
ACH_REACHED_OPEN_WATERS was already achieved
ACH_COMBO_EATER was already achieved
ACH_REACHED_OPEN_WATERS was already achieved
ACH_COMBO_EATER was already achieved
ACH_REACHED_OPEN_WATERS was already achieved
ACH_COMBO_EATER was already achieved
ACH_REACHED_OPEN_WATERS was already achieved
ACH_COMBO_EATER was already achieved
and the other messages are as follows
scooter : attempt to call a nil value songNoteDone
HERE!
scooter : attempt to call a nil value
songleaf : attempt to call a nil value
songleaf : attempt to call a nil value
songleaf : attempt to call a nil value
tromulo : attempt to call a nil value
rock0005 : attempt to call a nil value
pet_nautilus : attempt to call a nil value
Line: 0 EFX_SEGS 2 8 0.6 0.6 -0.03 0 2.5 1
Line: 1 EFX_SEGS 2 8 0.6 0.6 -0.03 0 2.5 0
Line: 2 EFX_SEGS 2 8 0.6 0.6 -0.03 0 4 0
Line: 3 EFX_ALPHA 1 0.5 1 1.0 -1 1
Line: 4 EFX_WAVY 20 8 0
loading wavy
Line: 5 EFX_WAVY 20 8 1
loading wavy
Line: 6 EFX_ALPHA 0 0.5 0.5 1 -1 0 0
ACH_REACHED_OPEN_WATERS was already achieved
ACH_COMBO_EATER was already achieved
Entering Game::removeState
avatar->endOfGameState()
toggle sceneEditor
gameSpeed
bgSfxLoop
toggleCursor
control hint
There're so many messages in my debug.log. I have no idea what messages are useful for you to fix problems. If it's possible, I'd like to show you my debug.log.
And I only used mouse while playing game.