tl;dr
unfortunetly you can integrate only "plain" LeadBolt banner. But at least here it is: LeadBolt plugin for Construct 2
quote from LeadBolt newsletter:
This New Year we are starting with some big LeadBolt news! In response to the great feedback received from developers, we have updated our range of compatibility libraries including additional support for some new frameworks. This allows you, the app developer, more options than ever before to access the advanced features (including re-engagement functionality and improved ad serving speed) in our latest ad serving SDKs.
Android / iOS:
Intel XDK NEW
Xamarin NEW
Construct2 NEW
Further info:
leadboltnetwork.net/publisher/help/index/cid:13
If you are using the Construct2 framework (https://www.scirra.com/construct2) for your Android or iOS app, simply download the following plugin to enable you to load LeadBolt SDK Ad types in your App. Click here to download the zip file
Simply follow the instructions in the Readme file that is included within the zip file to get started.
leadbolt.com/docs/lb_sdk_construct2_v1.00.zip