Honest review:

honestly im just gonna start by saying that the pc controls need fixing, aswell as needing more options to change (like the actual spike button since most pc players would rather it be left click). The camera is a bit weird to play on since you view it on a side angle and not from your character so if you could introduce camera settings like a top view or one that follows the character that would be nice. 

The hitboxes are just weird and need improvement. Passing is hard because the angle of the camera is weird and it messes with depth perception, but the hitbox is also only really there in the very small moment the animation of passing or setting happens which makes timing pretty hard. 

Thats really all the things i can think of improving other than the gameplay itself but the game being in developement thats guaranteed to change and improve. The game itself is pretty fun and has alot of potential so good luck. 

This is my honest feedback after about 5 hours of gameplay:

I know you recommend a controller but you got to have better starting keybinds for keyboard. I changed mine to movement on W,A,S,D and block, set and dive to K, O, P as it felt more natural because movement is maybe for most people second nature to have on W,A,S,D and then with your fast paced game it isn't possible to have action buttons asinged to the same fingers.

The timing for receiving and setting is a little unforgiving and even more so if you want to do a longer set because you have to perfect your trajectory too.

PLEASE FIX THIS : Even the most advanced robot ( lvl 9 ) tries to spike the ball from 5 meters out after you dive for the ball and it goes to the net. Maybe he should send the ball over by jumping and setting the ball to the other teams corner.

The serve mashine in the training dosen't work ( it spawns a ball that just drops on the floor and gets right back up as it resets and the cycle repeats ).

In the training the icons for actions and movement are a little too small.

Make it so that there are buttons for everything so that you can select each one with the mouse.

Kind of a hard request, but can you please add multiplayer by any chance, please.

5 Main issues otherwise its pretty fun:
1- Passing is so hard for no reasons sometimes I dont know why I got it or didnt get it
2- Blocking correctly feels impossible, only the bots can do it (after further playing, I figured out how to block, but to my understanding you need nearly max jump to be able to do it which is kinda buns, also you not only need to jump at the right time, be at the right place and press block at the right time to stuff your opponent, you also need to have the PERFECT angle which is really frustrating)
3- The bot teamate keeps fricking hitting into the fricking net it pisses me off
4- Acing is impossible. It's so easy to see where they're gonna hit it the only time you can miss is if you miss the pass (which goes back to the first issue), even lvl 1 bots are always on the ball and sometimes just decide to not pass it
5- Sometimes the bot, even at max lvl, just becomes braindead and stops moving, mainly happens after I miss a block

Really fun game but I don't know why it's so laggy the max fps I can get is 10 even with potato graphics. I also have a decent graphics card that can run more demanding games graphic wise.

Also I set the Max fps setting to unlimited

Game is super fun, however its really difficult aiming where you want to set or dig. Since they use the analog stick, you end up running away from the ball while trying to aim 

ts game is really fun dudeee

Do you plan to make a test version for mobile phones? If possible, I can test it and look for bugs, but I really liked the game, it's very different.