I've tried many other exploits and cheats to get to 100% completion and I found that none works with the device I'm currently using. But, after tinkering a bit, I found an exploit that may help you get 100% completion.

So, how this game works is that it saves your progress based on the last time you closed the game.
Knowing this, we can open several tab to play this game, and close the other tab where we failed, keeping the one where our progress is the largest and keep building from there.

So here are the steps :
1. Get to around 1000 score.
Starting from 100 just isn't worth it because it takes more unnecessary time and effort.

2. Open more tabs after you get your desired score.
You can open more tab by opening the game's local folder.
I opened 5 tabs simultaneously on my run. This is where the fun begins.

3. Put in all your score to try and get double, and if you loose in a tab, close it immediately.










4. Repeat number 3 until you are left with one tab.

5. Now after you are left with 1 tab, when you open the game, it might still show you the "Game Over" screen.
BUT NOT TO WORRY!
The game takes a while to save so just try to gamble in small numbers (ex : 1%-5% of your total score) on your last remaining open tab.

6. Keep repeating number 5 while reopening the game on a different tab to see if it had saved your progress.

7. Once you've launched the game and it shows the exact same score as your last tab, congrats, you are set to go. Open some more tab and repeat step 2-6.



8. 1 MILLION DOLLARS!



So there you go folks, hope this guide helps you as much as this helps me.
This is also the very first guide I've ever made for any games, so any critique is very much appreciated.

Have a million dollars.