Made an account just to comment.
I played this game when I was really young and I enjoyed it. I came back to it today and again, I was left with a very good impression and satisfaction. This game also got me introduced to street fighter games. Though I am not good at it, I still play from time to time, after of these years.
I remember first beating Akuma when I was really young and I was so excited to play as him.
This game is very fun. Though I am not good with words and I lack expression in writing, but this is a very good game and I left me with memories.
Also, to anyone reading this comment, I will leave some helpful tips if you are stuck with an opponent.
Of course, the controls are just the arrow keys to blocking against an opponent ( up, right and down block, and you have to choose what direction to point to block) as well as attacking, in which is indicated what arrow key to press. Also, you just the mouse the select what you want to do.
If you are stuck, the best strategy is just to ONLY put points into your guard when you Level Up. This is because you regenerate the same percentage of guard when you select the guard option in combat. Therefore, when you guard, you able to take more hits, essentially. This works against the bosses such as Akuma, Gouken, Sagat and Vega.
As Ryu, to get all levels, you have to complete the story as well as defeat ken in the prologue and Evil Ryu ( comes after Akuma fight, regardless if you win or lose and also levels up Ken as well)
As Ken, you have to complete story line, defeat ken and Evil Ryu (if not already defeated)
When you beat Akuma, you unlock the option to face Gen. When you play against Gen, you play as Akuma, and you'll find that if you haven't leveled up your fighting techniques (combo) for Ryu and Ken, there are some moves that you aren't able to use. However, to unlock those, just put all of your points in combo in the Level Up Screen (which unlocks moves) for Ken and Ryu. There, you will unlock the rest of Akuma's moves. (Shun Goku is one hit kill and requires no arrows keys to attack).
That is just my two cents that I will leave here. I hope this helps anyone who maybe is finding difficulty in this game.