Drop speed toggle, Suika Classic mode

Suika Classic

Suika classic is a new circles gamemode with physics that are meant to replicate Suika Game, and it also has new measurements for the size of the box, and all shapes to closely match the original game. If you're looking for an experience like Suika Game, this is about as close as it gets, however I might have to mess with a couple variables still like friction. In reality this means that shapes can be launched and are generally more dynamically moving around during the game, compared to being more static in the other versions. 

I added a drop speed toggle to allow people to use a slower drop rate if they prefer that, it shouldn't make much of a difference in most cases but it's there in case you want to use it. 

Experiment mode was removed, as it was just a place for me to test mechanics out before they were used elsewhere, like in Suika++. There was a warning that said scores would be deleted so hopefully this isn't a big deal. 

A couple simple effects were also added, one to animate the score, and also an effect like in Suika game where the objects disappear over time quickly after merging with a mask effect. 

I also rewrote a bit of the code so it should be easy to add new gamemodes with any combination of the existing mechanics in the game. For now no other mode changed with the addition of Suika Classic, but I could use the physics from that in triangles, or squares as well if I wanted to. It's also easy to add new shapes, so if anyone has anything they want to see in the game leave a comment and it might get added.