Clarence's Big Guide

So I checked out the list of "all" speedruns that are submitted, and I felt like I could improve the strategy used in the current fastest run. So I'm just gonna give you my strategy so you can find your way.

Level 1: 
First thing you do is run to the right, and as soon as you get to the second area, try to time a jump on the bed so you can keep your momentum. 
Once you get near the cat, avoid jumping on it, collect the key, and run back past the cat, since you'll be able to get free hearts later.
Run back and once again, the bed jump, to the TV, is crucial.
Once you reach the dog, run past him and hit the bed so you can make it all the way up without jumping a second time on the shelf.
Collect the 3 harts that you'll need and jump over the mom.

Skip all doors and go straight to the living room.

The living room starts off with some jumping, and if you're lucky, you'll lose no hearts. Get the key, and when you reach the area with the house keys, you need to time your jumps, jump on the cat whilst in midair, and you'll save a few seconds. Get the keys, and finish the rest of the level.
Taking damage on the dad jumps is fine, and if you're lucky enough, you'll have enough harts to get the last key fast.
Finish the rest of the level with ease, exit the living room and jump over your shoes.
If you got sub 2:30 on this part, you're on a good pace.


Level 2:
Once outside, make your way to the first house (not the pink door), go up and get the car. You can avoid the grandma's house. To get the key on the street lamp, jump on the bird and get a boost high enough to reach the key. This saves a lot of time.

Once you passed the checkpoint, go in the first door that is unlocked. Inside is, in my opinion, the hardest part of the game. Be lucky enough and reach the door. 
If you're lucky you don't take damage from the dog, hit the car button and go back out of the house.

Time your jumps and you can make it without getting hit, and it's possible to skip the street light, which I recommend.
Get the car, drive back and break the barriers.
Don't go inside the last building, but use the stairs. Get the car and when you go down the warp hole, don't go full speed, because you'll hit a wall, which costs time.
Once in the forest, keep driving and if you have good timing, you can jump out of the car before it goes underwater and jump over the pond.
Minor jumping will take you to level 3.

Level 3:
Just run...

Level 4:
Once outside, make your way past the first few jumps, then try to avoid as many bullets as you can.
Hit the checkpoint and go right to collect the first out of 5 keys. Before you collect the key, there are 3 vanishing blocks between you the key, and if you avoid walking on all of them, you can take the remaining block back so you don't have to wait for them to come back.

Once back to the checkpoint area, go up one level and collect the second key. Use either the thug or the vanishing block to get it and make your way back. 

Once back, go up two levels, not one. I'll come back to that. Make your way to the cops and you may be able to use the thugs as a jump boost. You are definitely taking damage here, so keep that in mind. Get the third key and go back.

Go up two levels again, for the same reason, finish the jumps, and if you have skill, you'll be able to make it from the platform with the fourth key all the way to the checkpoint.

Go down three levels, and reach the checkpoint near the bats and collect the final key. If you're lucky enough you can do this without taking damage.

So now that you have all 5 keys, make your way back to the checkpoint. The ladder next to it leads to the car. The reason we saved this part for last is so that we don't have to run here twice. Go up the ladder and to the right is the car button. Take the car, mash those blocks and fall in the warp pit. 
Don't jump out once you fell, because you need to break a few more blocks. After that, jump out and run to the restaurant.

Level 5:
You have nothing skillful left to do, it's just spamming spacebar, or enter. If you're like me, you'll spam both. After she walks away, a text box appears and you'll have to press enter. The ending appears and you will have completed Clarence's Big Chance any% No Refresh.

Thanks for using this guide, and if you want me to cover the other categories, let me know. My discord is on my page.