Since I couldn't find the par times anywhere online, I decided to make one myself.
The par times aren't one hundred percent perfect, most of them are whatever time I got to get the par time star.

If you have a correction or the real par time, say it in the comment section and I'll fix it!
All times in this guide assume duck mode, I haven't checked fully if there different depending on the character, but from what i've checked, they aren't!

I hope this guide helps, and thanks for reading!

General tips:

• Go for the achievement in duck mode, the duck's size and flight lets it skip sections, and you don't have to fight the bosses.
  
• Go for the achievement on easy, It allows you to power through some sections without worrying about health.
  
• Don't get hit. Getting hit slows you down, and on some stages, getting hit once can be the difference between making and missing par time. So try not to get hit unless doing so skips or saves time.
  
• Always hold space or forward to go faster on rail sections. This more or less guarantees par time for them.

Some Stage Notes:

• Level 01: On the last screen, if you hold right, you can walk under the boss. He can't hit you, and you'll get to the exit as soon as it's available.
  
• Level 07: On the Tetris section, you have to jump on the first platform that falls on the right wall before it hits the ground, and jump off (fly up) it to get to the exit. This saves a lot of time, and I had trouble getting par for this stage without doing this trick. Make sure you jump on the leftmost platform once it comes down, get on the highest block on it, then jump right and try to land on leftmost tetrimino that's coming down!
  
• Level 10: Don't fly too much, as the panda slows down. As the duck, you can use your flight ability to clear obstacles without the panda having to climb it, saving time.
  
• Level 13: Although you want to hold forward on the horse, going offtrack or getting hit slows you down tremendously, so slow down to take the turn.
  
• Level 15: On the elevator section in the beginning of the stage, if you position your duck right at the second chain (to the right of the first ninja that jumps out), nothing will hit you.
  
• Level 23: On the flying convenor belt section, you can skip the last section of it by jumping on the platform, instead of waiting for it to turn around and bring you to it. Once you see the yellow rotating turret, jump, and position yourself right in front of it, as that's where the platform it.

level 01: 38:30 (40:00?)
level 02: 39:03 (40:00?)
level 03: 40:63
level 04: --Not in duck mode--

level 05: 37:71 (40:00?)
level 06: 36:42
level 07: 35:75
level 08: --Not in duck mode--

level 09: 45:06
level 10: 44:84
level 11: 35:37
level 12: --Not in duck mode--

level 13: 59:05
level 14: 37:19
level 15: 45:95
level 16: --Not in duck mode--

level 17: 39:70
level 18: 40:90
level 19: 52:48
level 20: --Not in duck mode--

level 21: 60:01
level 22: 46:63
level 23: 42:96
level 24: --Not in duck mode--
level 25: --Not in duck mode--

*Getting a time of or under the times in plain text will guarantee par
**Guesses for the actual par time are in Parenthesis.