diff --git a/BNNBot_garage/BNNBot b/BNNBot_garage/BNNBot
index 4ebb2d9..4df8ee6 100755
Binary files a/BNNBot_garage/BNNBot and b/BNNBot_garage/BNNBot differ
diff --git a/BNNBot_garage/src/BNNBot.nim b/BNNBot_garage/src/BNNBot.nim
index 6c82d99..e9a304a 100644
--- a/BNNBot_garage/src/BNNBot.nim
+++ b/BNNBot_garage/src/BNNBot.nim
@@ -94,8 +94,8 @@ method onScannedBot*(bot: BNNBot, e: ScannedBotEvent) =
 
     let bulletDist = b.bulletSpeed * float(b.trace.age)
     if bulletDist >= b.fireDist or b.trace.age >= TRACE_MAX_AGE:
-      let bulletX   = b.fireX + sin(degToRad(b.aimAngleDeg)) * bulletDist
-      let bulletY   = b.fireY + cos(degToRad(b.aimAngleDeg)) * bulletDist
+      let bulletX   = b.fireX + cos(degToRad(b.aimAngleDeg)) * bulletDist
+      let bulletY   = b.fireY + sin(degToRad(b.aimAngleDeg)) * bulletDist
       let enemyDist = hypot(bulletX - bot.lastEnemyX, bulletY - bot.lastEnemyY)
       if enemyDist < 36.0:
         bot.net.learn(b.trace, HIT_REWARD)
@@ -110,9 +110,8 @@ method onScannedBot*(bot: BNNBot, e: ScannedBotEvent) =
 
   # epsilon-greedy exploration
   if rand(1.0) < bot.epsilon:
-    for j in 0..<OUTPUT_BITS:
-      if rand(1.0) < 0.5:
-        outVec[j] = 1'u8 - outVec[j]  # flip bit
+    let flipIdx = rand(OUTPUT_BITS - 1)
+    outVec[flipIdx] = 1'u8 - outVec[flipIdx]
   bot.epsilon = max(EPSILON_MIN, bot.epsilon * EPSILON_DECAY)
 
   let aimOffset = decodeOutput(outVec)