Here's a game that I played a lot when I had Windows 98: the original
3-D Ultra Pinball! I honestly think it would make a wonderful addition to the Abandonia ISO Cellar and, if its ripped size is less than 150MB, the regular, publicly-available collection.
Technical Specs for Windows 3.1 (from MobyGames)
Minimum CPU Class Required: 80486DX
Minimum OS Class Required: Windows 3.1
Minimum RAM Required: 8 MB
Media Type: CD-ROM
Minimum CD-ROM Drive Speed Required: 4X
Video Modes Supported: 256 Colors Required, SVGA/XGA (640*480)
Input Devices Supported: Keyboard
Number of Players: Offline 1 Player
Notes: Pentium CPU recommended.