Found 2 ratings (with comment) on this game

Summer Time is an unusual game with timed gameplay mechanic.

The Pros:
A novel idea that was not implemented this well again until Safecracker. This game requires some interesting strategies as there is no bonus and in the case of this game, heading out on the outlanes is a good thing. Where do you put the ball? How do you maximize your time on the PF between points and hitting targets that give you more time (hint... go for more time!) The Christian Marche art package is spot on all around. Even the cabinet is just right! While Vacation like is the best way to describe this theme. Which is strange in the sense that this game is about tension with the clock. The game's action at the top is tight and fast, at the bottom it is open and due to the flipper layout, requires a bit more nudging than most games of this vintage (esp. from Norm Clark) would require.

The Cons:
The saucer is more of a luck than an aimed shot. This game has got to be set up JUST RIGHT, or either the player will play forever and get bored, or they will get worked very quickly and in a frustrated state, walk away to never play this game again. Nothing is more frustrating than just reaching 0 seconds on the clock AND THEN... getting the stop clock target. This table must be fresh, fast and bouncy to play as it should.

The Takeaway:
Find this game and hope that it has been "dialed" properly. If not, just know that the difficulty settings on this game make all the difference. If this deck is in a personal collection, session it out and see if it's nuances and strategies come to your gameplay. If this game is set up properly and adjusted to your play style... it can make your game room a very exciting place to be. The technology is much older, but like Safecracker, this game (when setup properly) is more than a novelty.

Fun game that was ahead of its time. Great backglass !!!