As a small tip for getting the hard badge, what worked for me was just constantly pausing, like someone else said. 1: Collect all five balls 2: Pause 3: Choose the color needed (you can change the color when paused with the hotkeys) 4: Aim 5: Unpause and shoot. Repeat. I've tried doing this legit for hours and never got more than 9k. I did this strat and got it on my first try. Good luck.
Really a solid game, 4 / 5 only because the keyboard movement is extremely slippery. I think this badge would definitely be impossible rated if not for the 2P cheese people can do. However, if you are struggling a bit with this and don't have friends, I found a bug you might be able to exploit to get it. If you leave this game on in the background (for chrome, switch tabs or scroll down the page so the game isn't visible), it continues running without you dying for about 3 minutes from what I tested. Although I got it legit, I haven't gotten 25k from this method yet. It might not be anything, but it looks promising.
I'm surprised at how this game is rated so highly for being a puzzle game, when really it's just a luck game that requires you to get lucky instead of playing well. Without checkpoints, this game is extremely tedious and honestly awful. It's awful mainly in part by the game not giving you a specific tile during a level that you need, requiring you to have a joker/bomb or other variety to complete the level. Thus, this makes them not bonuses but requirements that you need to acquire early on if you want to beat the game. After finally getting the achievement, all I can say is what everyone else says. Get around 5 jokers in the first 5 to 6 levels, and carry them through to the last segment. That's really the only tip you can get with this game, the only other one being to hope the game is nice to you and you get lucky, because that's the only thing that will let you beat any of the later levels without (and even sometimes with) bonuses. Good luck.