The game
Send the ball over the net and make it land on your opponent's side to win a point. The first player to 6 points wins.
You can hit the ball as many times as you like, and you can win a point even when you didn't serve.
Play a friend in two-player mode, or take on a lineup of computer opponents in one-player mode — where you're the slime on the left.
One player — you control the left slime
A or ←Move left
W or ↑Jump
D or →Move right
Two players
APlayer 1 — move left
WPlayer 1 — jump
DPlayer 1 — move right
J or ←Player 2 — move left
I or ↑Player 2 — jump
L or →Player 2 — move right
Game controls
ClickStart a game, choose 1 or 2 players, or advance past a cleared-level / result screen (any key works too)
1 2Start a one- or two-player game from the title screen
SpaceWatch a replay of the last rally
KRestart the current level (one-player)
CContinue a one-player run from the title screen
PPause a match — press any key to resume. During a replay, toggles play/pause (alongside the scrubber slider)
+−Increase / decrease the game size
Scoring (one-player)
Ace — opponent never touches your serve200
Winner — win a rally you hit the ball in100
Point — any other rally you win50
Level bonus1000 × your pts / total pts
Time bonus (if under 5 min)300 − seconds
Flawless victory — win 6–0 (the star stays by your score while you're on track)1000
Later levels multiply every point you earn — level 6 is worth 32× as much as level 1.
Credits
Based on Slime Volleyball by Quin Pendragon and Daniel Wedge.
© 2026 Anil Rhemtulla. See the licence for what that covers.
Build
Ace of Slime is free and ad-free. If you'd like to help cover the domain, there's a tip jar.
Privacy
Your settings and best scores are saved in this browser alone. There are no accounts, no cookies, and no ads.
The game reports how it is being played to Umami, a cookieless analytics service, so that faults get noticed and fixed. Each report covers the game and how it is set up — the look and difficulty in use, the sound, speed and quality settings, how a match or level ended, frame-rate samples, and any error the game hits — along with your display size, whether you are playing by touch or with a mouse, and whether you have asked for reduced motion.
None of it identifies you, and none of it is sold or shared. Nothing you type or click anywhere else is recorded.