OBT v0.9.4 - pause menu, particles, difficulty increased

Hello my players! Hope you all had a nice new year celebration!

On this update, I included a pause menu, particles, and the most important change: some enemies now can stand more shots.
Yup, I decided to increase  the difficulty! Buahahahaha!

So, now, from wave 5 onward, there is a possibility of enemies with 2 hp, each wave increasing in 2% this chance;
and from wave 10 onward, there's a chance of  enemies with 3 hp, each wave increasing in 1% this chance.

Enemies with 2 hp will give you 5 points, and enemies with 3 hp 10 points.

I'm planning to adding different kinds of enemies and to add different kinds of weapons on the next versions.